Didepsipeptide-based endoparasiticides, new didepsipeptides and process for preparing the same

ABSTRACT

The present invention relates to the use of didepsipeptides of the general formula (I) and their salts 
     
       
         
         
             
             
         
       
         
         in which 
         the radicals have the meaning given in the description, and to new didepsipeptides and processes for their preparation.

This application is a continuation of Ser. No. 09/011,599, filed Feb. 3, 1998, now abandoned, which is a national stage entry of PCT/EP96/03355, filed Jul. 30, 1996, which claims foreign priority to 19529604.4, filed Aug. 11, 1995.

The present invention relates to the use of didepsipeptides for the control of endoparasites, to new didepsipeptides and to processes for their preparation.

Certain didepsipeptides are, as starting substances for endoparasiticidally active cyclic depsipeptides (cf. total synthesis of PF 1022 A: JP Pat. 05 229 997; Makoto Ohyama et al., Biosci. Biotech. Biochem. 58 (6), 1994, pp. 1193-1194; Makio Kobayshi et al., Annu. Rep. Sankyo Res. Lab. 46, 1994, pp. 67-75; Stephen J. Nelson et al., J. Antibiotics 47, (11), 1994, pp. 1322-1327; cyclooctadepsipeptides: WO 93/19053, EP 0 634 408 A1; WO 94/19334; WO 95/07272; EP 626 375; EP 626 376; cyclohexadepsipeptides: DE-OS [German Published Specification] 4342 907; WO 93/25543) and open-chain depsipeptides, for example octadepsipeptides (DE-OS [German Published Specification] 4 341 993), hexadepsipeptides (DE-OS [German Published Specification] 4 341 992) or tetradepsipeptides (DE-OS [German Published Specification] 4 341 991), the subject of prior-published patent applications and publications. Some of these abovementioned didepsipeptides are also the subject of non-prior-published German Patent Applications (P 44 40 193.0; P 44 01 389.2).

The present invention relates to:

-   1. The use of didepsipeptides of the general formula (I) and their     salts

-    in which     -   R¹ represent hydrogen, straight-chain or branched alkyl,         cycloalkyl, arylalkyl, aryl, heteroaryl, heteroarylalkyl, each         of which is optionally substituted,     -   R¹ and R² together with the atoms to which they are bonded         represent a 5- or 6-membered ring which can optionally be         interrupted by oxygen, sulphur, sulphoxyl or sulphonyl and is         optionally substituted,     -   R² and R³ independently of one another represent hydrogen,         straight-chain or branched alkyl, alkenyl, cycloalkyl,         cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl,         each of which is optionally substituted, or     -   R² and R³ together represent a spirocyclic ring, which is         optionally substituted,     -   R⁴ and R⁵ independently of one another represent hydrogen,         straight-chain or branched alkyl, alkenyl, cycloalkyl,         cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl,         each of which is optionally substituted, or     -   R⁴ and R⁵ together represent a spirocyclic ring, which is         optionally substituted,     -   A represents hydrogen, alkyl, aralkyl, formyl, alkoxydicarbonyl         or a radical of the group G¹

-   -    in which

-   -   -    can denote carboxyl, thiocarboxyl, —CH═CH—NO₂, —CH═CH—CN,             —C═N—R⁶, sulphoxyl, sulphonyl, —P(O)—OR⁷ or P(S)—OR⁷,         -   R⁶ represents hydrogen, hydroxyl, alkoxy, alkylcarbonyl,             halogenoalkylcarbonyl, alkylsulphonyl, nitro or cyano, and         -   R⁷ represents hydrogen or alkyl, and

    -   Q represents straight-chain or branched alkyl, alkenyl, alkinyl,         cycloalkyl, aryl, arylalkyl, hetaryl or hetarylalkyl, each of         which is optionally substituted, or optionally represents a         radical from the group G² and G³

-   -    in which

-   -   -    can denote carboxyl, thiocarboxyl or sulphonyl,         -   Y represents oxygen, sulphur or —NR⁹,         -   R⁸ in the case where Y represents nitrogen can denote a             cyclic amino group linked via a nitrogen atom,         -   R⁸ and R⁹ independently of one another represent hydrogen,             straight-chain or branched alkyl, alkenyl, alkinyl,             cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, hetaryl,             hetarylalkyl, each of which is optionally substituted, or         -   R⁸ and R⁹ together with the adjacent N atom [lacuna] a             carbocyclic 5-, 6- or 7-membered ring system or a 7 to             10-membered bicyclic ring system which can optionally also             be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl,             carbonyl, —N—O—, —N═, —NR¹¹— or by quaternized nitrogen and             is optionally substituted,         -   R¹⁰ represents hydrogen or alkyl,         -   R¹¹ represent represents hydrogen, straight-chain or             branched alkyl, alkenyl, alkinyl, cycloalkyl,             cycloalkylalkyl, alkoxycarbonyl, alkylcarbonyl,             cycloalkylcarbonyl, cyano, aryl, arylalkyl, hetaryl,             hetarylalkyl, each of which is optionally substituted, and

    -   B represents hydroxyl, alkoxy, alkenyloxy, alkinyloxy,         cycloalkyloxy, cycloalkylalkyloxy, aryloxy-, arylalkyloxy,         hetaryloxy, hetarylalkyloxy, each of which is optionally         substituted, or

    -    represents the radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and —NR¹⁵—OR¹⁶,

    -    in which         -   R¹² and R¹³ independently of one another represent hydrogen,             straight-chain or branched alkyl, alkylcarbonyl,             alkylsulphonyl, alkenyl, alkinyl, cycloalkyl,             cycloalkylalkyl, aryl, arylcarbonyl, arylsulphonyl,             arylalkyl, hetaryl, hetarylcarbonly, hetarylsulphonyl or             hetarylalkyl, each of which is optionally substituted, or         -   R¹² and R¹³ together with the adjacent N atom [lacuna] a             carbocyclic 5-, 6-, 7- or 8-membered ring system or a 7 to             10-membered bicyclic ring system which can optionally also             be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl,             carbonyl, —N—O—, —N═, —NR¹¹— or by quaternized nitrogen and             is optionally substituted,         -   R¹⁴ represents hydrogen, straight-chain or branched alkyl,             cycloalkyl, arylalkyl or hetarylalkyl, each of which is             optionally substituted,         -   R¹⁵ and R¹⁶ independently of one another denote hydrogen,             straight-chain or branched alkyl, alkylcarbonyl, alkenyl,             alkinyl, cycloalkyl, cycloalkylalkyl, arylalkyl or             hetarylalkyl, each of which is optionally substituted,         -   R¹⁵ and R¹⁶ together with the adjacent N—O-group represent a             carbocyclic 5-, 6- or 7-membered ring,             and their optical isomers and racemates,             for the control of endoparasites in medicine and veterinary             medicine.

Preferably used didepsipeptides are those of the general formula (I) and their salts

in which

-   -   R¹ represent hydrogen, straight-chain or branched alkyl having         up to 6 carbon atoms, C₃₋₆-cycloalkyl, aryl-C₁₋₂-alkyl or         het-C₁₋₂-alkyl, each of which is optionally substituted,     -   R¹ and R² together with the atoms to which they are bonded         represent a 5- or 6-membered ring which can optionally be         interrupted by sulphur and is optionally substituted,     -   R² and R³ independently of one another represent hydrogen,         straight-chain or branched alkyl having up to 6 carbon atoms,         halogenoalkyl, hydroxyalkyl, C₁₋₄-alkanoyloxyalkyl,         C₁₋₂-alkoxyalkyl, mercaptoalkyl, C₁₋₂-alkylthioalkyl,         C₁₋₂-alkylsulphinylalkyl, C₁₋₂-alkylsulphonylalkyl,         carboxyalkyl, carbamoylalkyl, aminoalkyl, C₁₋₆-alkylaminoalkyl,         C₁₋₆-dialkylaminoalkyl, guanidinoalkyl, which can optionally be         substituted by one or two benzyloxycarbonyl radicals or by one,         two, three or four C₁₋₂-alkyl radicals,         C₁₋₄-alkoxycarbonylaminoalkyl, C₂₋₆-alkenyl, C₃₋₆-cycloalkyl,         C₃₋₆-cycloalkyl-C₁₋₂-alkyl, and optionally substituted aryl,         aryl-C₁₋₂-alkyl, heteroaryl, heteroaryl-C₁₋₂-alkyl, or     -   R² and R³ together represent a spirocyclic ring,     -   R⁴ and R⁵ independently of one another represent hydrogen,         straight-chain or branched alkyl having up to 6 carbon atoms,         halogenoalkyl, hydroxyalkyl, C₁₋₄-alkanoyloxyalkyl,         C₁₋₂-alkoxyalkyl, mercaptoalkyl, C₁₋₂-alkylthioalkyl,         C₁₋₂-alkylsulphinylalkyl, C₁₋₂-alkylsulphonylalkyl,         carboxyalkyl, carbamoylalkyl, aminoalkyl, C₁₋₆-alkylaminoalkyl,         C₁₋₆-dialkylaminoalkyl, guanidinoalkyl, which can optionally be         substituted by one or two benzyloxycarbonyl radicals or by one,         two, three or four C₁₋₂-alkyl radicals,         C₁₋₄-alkoxycarbonylaminoalkyl, C₂₋₆-alkenyl, C₃₋₆-cycloalkyl,         C₃₋₆-cycloalkyl-C₁₋₂-alkyl, and optionally substituted aryl,         aryl-C₁₋₂-alkyl, heteroaryl, heteroaryl-C₁₋₂alkyl, or     -   R⁴ and R⁵ together represent a spirocyclic ring,     -   A represents hydrogen, C₁₋₆-alkyl, aryl-C₁₋₂-alkyl, formyl,         C₁₋₄-alkoxydicarbonyl or a radical of the group G¹

-   -    in which

-   -   -    can denote carboxyl, thiocarboxyl, —C═CH—NO₂, —C═CH—CN,             —C═N—R⁶, sulphoxyl, sulphonyl, —P(O)—OR⁷ or P(S)—OR⁷,         -   R⁶ represents hydrogen, hydroxyl, C₁₋₄-alkoxy,             C₁₋₄-alkylcarbonyl, C₁₋₄-halogenoalkylcarbonyl,             C₁₋₄-alkylsulphonyl, nitro or cyano, and         -   R⁷ represents hydrogen or C₁₋₄-alkyl, and         -   Q represents straight-chain or branched C₁₋₆-alkyl,             C₁₋₆-halogenoalkyl, hydroxy-C₁₋₆-alkyl,             C₁₋₄-alkanoyloxy-C₁₋₆-alkyl, C₁₋₂-alkoxy-C₁₋₆-alkyl,             mercapto-C₁₋₆-alkyl, C₁₋₂-alkylthio-C₁₋₆-alkyl,             C₁₋₂-alkylsulphinyl-C₁₋₆-alkyl,             C₁₋₂-alkylsulphonyl-C₁₋₆-alkyl, carboxy-C₁₋₆-alkyl,             carbamoyl-C₁₋₆-alkyl, amino-C₁₋₆-alkyl,             C₁₋₆-alkylamino-C₁₋₆-alkyl, C₁₋₆-dialkylaminoalkyl,             C₂₋₆-alkenyl, C₂₋₆-alkinyl, C₂₋₆-halogenoalkenyl,             C₃₋₆-cycoalkyl, and optionally substituted aryl,             aryl-C₁₋₂-aryl, hetaryl or hetaryl-C₁₋₂-alkyl, or optionally             represents a radical from the group G² and G³

-   -   -   in which

-   -   -   -    can denote carboxyl, thiocarboxyl or sulphonyl,             -   Y represents oxygen, sulphur or —NR⁹,             -   R⁸ in the case where Y represents nitrogen can denote a                 cyclic amino group linked via a nitrogen atom,             -   R⁸ and R⁹ independently of one another represent                 hydrogen, straight-chain or branched C₁₋₆-alkyl,                 C₁₋₆-alkenyl, C₁₋₆-alkinyl, C₃₋₆-cycloalkyl,                 C₃₋₆-cycloalkyl-C₁₋₂-alkyl, aryl, arylalkyl, hetaryl,                 hetarylalkyl, each of which is optionally substituted,                 or             -   R⁸ and R⁹ together with the adjacent N atom [lacuna] a                 carbocyclic 5-, 6- or 7-membered ring system or a 7 to                 10-membered bicyclic ring system which can optionally                 also be interrupted by oxygen, sulphur, sulphoxyl,                 sulphonyl, carbonyl, —N—O, —N═, —NR¹¹— or by quaternized                 nitrogen and is optionally substituted,             -   R¹⁰ represents hydrogen or C₁₋₄-alkyl,             -   R¹¹ represents hydrogen, straight-chain or branched                 C₁₋₆-alkyl, C₂₋₆-alkenyl, C₂₋₆-alkinyl, C₃₋₈-cycloalkyl,                 C₃₋₈-cycloalkyl-C₁₋₂-alkyl, C₁₋₄-alkoxycarbonyl,                 C₁₋₄-alkylcarbonyl, C₃₋₆-cycloalkylcarbonyl, cyan, aryl,                 aryl-C₁₋₂-alkyl, hetaryl, hetaryl-C₁₋₂-alkyl, each of                 which is optionally substituted, and

    -   B represents hydroxyl, C₁₋₆-alkoxy, C₂₋₆-alkenyloxy,         C₂₋₆-alkinyloxy, C₃₋₇-cycloalkyloxy, C₃₋₇-cycloalkylalkyloxy,         aryloxy-, aryl-C₁₋₂-alkyloxy, hetaryloxy, hetaryl-C₁₋₂-alkyloxy,         each of which is optionally substituted, or

    -    represents the radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and —NR¹⁵—OR¹⁶,

    -    in which         -   R¹² and R¹³ independently of one another represent hydrogen,             straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl,             C₁₋₆-alkylsulphonyl, C₂₋₆-alkenyl, C₂₋₆-alkinyl,             C₃₋₈-cycloalkyl, C₃₋₈-cycloalkyl-C₁₋₂-alkyl, aryl,             arylcarbonyl, arylsulphonyl, aryl-C₁₋₂-alkyl, hetaryl,             hetarylcarbonyl, hetarylsulphonyl or hetaryl-C₁₋₂-alkyl,             each of which is optionally substituted, or         -   R¹² and R¹³ together with the adjacent N atom [lacuna] a             carbocyclic 5-, 6-, 7- or 8-membered ring system or a 7 to             10-membered bicyclic ring system, which can optionally also             be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl,             carbonyl, —N—O—, —N═, —NR¹¹— or by quaternized nitrogen and             is optionally substituted,         -   R¹⁴ represents hydrogen, straight-chain or branched             C₁₋₆-alkyl, C₃₋₆-cycloalkyl, aryl-C₁₋₂-alkyl,             hetaryl-C₁₋₂-alkyl, each of which is optionally substituted,         -   R¹⁵ and R¹⁶ independently of one another denote hydrogen,             straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl,             C₂₋₆-alkenyl, C₂₋₆-alkinyl, C₃₋₆-cycloalkyl,             C₃₋₆-cycloalkyl-C₁₋₂-alkyl, aryl-C₁₋₂-alkyl or             hetaryl-C₁₋₂-alkyl, each of which is optionally substituted,         -   R¹⁵ and R¹⁶ together with the adjacent N—O-group represent a             carbocyclic 5-, 6- or 7-membered ring,             and their optical isomers and racemates,             for the control of endoparasites in medicine and veterinary             medicine.

The compounds of the formula (I) are known in some cases and can be prepared analogously to known processes.

The invention further relates to:

-   2. New didepsipeptides of the general formula (Ia) and their salts

-    in which     -   R¹ represents hydrogen, straight-chain or branched C₁₋₄-alkyl,         C₃₋₆-cycloalkyl, aryl-C₁₋₂-alkyl or hetaryl-C₁₋₂-alkyl, each of         which is optionally substituted, and     -   R¹ and R² together with the atoms to which they are bonded         represent a 5- or 6-membered ring which can optionally be         interrupted by oxygen, sulphur, sulphoxyl or sulphonyl and is         optionally substituted,     -   R² represents hydrogen, straight-chain or branched alkyl having         up to 6 carbon atoms, alkenyl having up to 4 carbon atoms,         C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, aryl,         aryl-C₁₋₂-alkyl, hetaryl, hetaryl-C₁₋₂-alkyl each of which is         optionally substituted,     -   R³ and R⁴ represent hydrogen,     -   R⁵ represents hydrogen, straight-chain or branched alkyl having         up to 6 carbon atoms, alkenyl having up to 4 carbon atoms,         C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, aryl,         aryl-C₁₋₂-alkyl, hetaryl, hetaryl-C₁₋₂-alkyl each of which is         optionally substituted,

-   -   -    represents carboxyl, thiocarboxyl, —C═CH—NO₂, —C═CH—CN,             —C═N—R⁶, sulphoxyl, sulphonyl, —P(O)—OR⁷ or P(S)—OR⁷,         -   R⁶ represents hydrogen, hydroxyl, C₁₋₄-alkoxy,             C₁₋₄-alkylcarbonyl, C₁₋₄-halogenoalkylcarbonyl,             C₁₋₄-alkylsulphonyl, nitro or cyano, and         -   R⁷ represents hydrogen or C₁₋₄-alkyl, and

    -   Q represents straight-chain or branched C₁₋₆-alkyl,         C₂₋₆-alkenyl, C₂₋₆-alkinyl, C₃₋₆-cycloalkyl or         hetaryl-C₁₋₂-alkyl, each of which is optionally substituted, or         optionally represents a radical from the group G² and G³

-   -    in which

-   -   -    can denote carboxyl, thiocarboxyl or sulphonyl,         -   Y represents oxygen, sulphur or —NR⁹,         -   R⁸ in the case where Y represents nitrogen can denote a             cyclic amino group linked via a nitrogen atom,         -   R⁸ and R⁹ independently of one another represents hydrogen,             straight-chain or branched C₁₋₆-alkyl, C₂₋₆-alkenyl,             C₂₋₆-alkinyl, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl,             hetaryl or hetaryl-C₁₋₂-alkyl, each of which is optionally             substituted, or         -   R⁸ and R⁹ together with the adjacent N atom represent a             carbocyclic 5-, 6- or 7-membered ring system or a 7 to             10-membered bicyclic ring system which can optionally also             be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl,             carbonyl, —N—O—, —N═, —NR¹¹— or by quaternized nitrogen and             is optionally substituted,         -   R¹⁰ represents hydrogen or C₁₋₄-alkyl, and         -   R¹¹ represents hydrogen, straight-chain or branched             C₁₋₆-alkyl, C₃₋₆-cycloakyl, C₂₋₆-alkenyl, C₂₋₆-alkinyl,             C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl,             C₁₋₄-alkoxycarbonyl, C₁₋₄-alkylcarbonyl,             C₃₋₆-cycloalkylcarbonyl, cyano, aryl, aryl-C₁₋₂-alkyl,             hetaryl or hetaryl-C₁₋₂-alkyl, each of which is optionally             substituted, and

    -   B represents C₁₋₆-alkoxy, C₂₋₆-alkenyloxy, C₂₋₆-alkinyloxy,         C₃₋₇-cycloalkyloxy, C₃₋₇-cycloalkyl-C₁₋₂-alkyloxy, aryloxy-,         aryl-C₁₋₂-alkyloxy, hetaryloxy, hetaryl-C₁₋₂-alkyloxy, each of         which is optionally substituted, or

    -    represents the amino radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and         —NR¹⁵—OR¹⁶, in which         -   R¹² and R¹³ independently of one another represent hydrogen,             straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl,             C₁₋₆-alkylsulphonyl, C₂₋₆-alkenyl, C₂₋₆-alkinyl,             C₃₋₈-cycloalkyl, C₃₋₈-cycloalkyl-C₁₋₂-alkyl, aryl,             arylcarbonyl, arylsulphonyl, aryl-C₁₋₂-alkyl, hetaryl,             hetarylcarbonyl, hetarylsulphonyl or hetaryl-C₁₋₂-alkyl,             each of which is optionally substituted, or         -   R¹² and R¹³ together with the adjacent N atom represent a             carbocyclic 5-, 6-, 7- or 8-membered ring system or a 7 to             10-membered bicyclic ring system, which can optionally also             be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl,             carbonyl, —N—O, —N═, —NR¹¹— or by quaternized nitrogen and             is optionally substituted,         -   R¹⁴ represents hydrogen, straight-chain or branched             C₁₋₆-alkyl, C₃₋₆-cycloalkyl, each of which is optionally             substituted,         -   R¹⁵ and R¹⁶ independently of one another denote hydrogen,             straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl,             C₂₋₆-alkenyl, C₂₋₆-alkinyl or C₃₋₆-cycloalkyl, each of which             is optionally substituted, and         -   R¹⁵ and R¹⁶ together with the adjacent N—O-group represent a             carbocyclic 5-, 6- or 7-membered ring,

    -   with the proviso in the case where in formula (Ia) R¹, R⁵ and         =G=X together represent the following radicals:

    -   R¹ represents hydrogen and methyl,

    -   R⁵ represents hydrogen,

-   -    represents carboxyl,     -   the radicals Q and B must fulfil the following condition:     -   Q represents radicals other than methyl,     -   B represents radicals other than —NH₂,     -   and with the proviso in the case where in formula (Ia) G² and         =G=X together represent the following radicals:

-   -    represents carboxyl,     -   G² represents tert-butyloxy, benzyloxy and 4-nitro-benzyloxy,     -   the radical B represents radicals other than tert-butyloxy,         benzyloxy and 4-nitro-benzyloxy,     -   and their optical isomers and racemates.

-   3. Process for the preparation of the new didepsipeptides of the     general formula (Ia) and their salts,

in which

-   -   the radicals R¹, R², R³, R⁴, R⁵, G, Q, X and B have the meaning         indicated under item 2,     -   characterized in that         -   a) N-terminal-substituted amino acids of the general formula             (II)

-   -   -    in which             -   the radicals R¹, R², R³, G, Q, and X have the meaning                 indicated under item 2, or their carboxyl-activated                 derivatives or their alkali metal salts, are reacted, if                 appropriate in the presence of a catalyst, if                 appropriate in the presence of an acid-binding agent and                 if appropriate in the presence of a diluent, with                 carboxylic acid derivatives of the general formula (III)

-   -   -   -    in which                 -   the radicals R⁴, R⁵ and B have the meaning indicated                     under item 2 and Z represents a suitable leaving                     group for example halogen such as bromine, chlorine                     fluorine, or hydroxyl, or

        -   b) N-terminal-deblocked didepsipeptides of the general             formula (Ib)

-   -   -    in which             -   the radicals R¹, R², R³, R⁴, R⁵ and B have the meaning                 indicated under item 2, are reacted, if appropriate in                 the presence of a catalyst, if appropriate in the                 presence of an acid-binding agent and if appropriate in                 the presence of a diluent, with compounds of the general                 formula (IV)

-   -   -   -    in which                 -   the radicals G, Q, W and X have the meaning                     indicated under item 2 and W represents a suitable                     leaving group, for example halogen, alkoxy,                     alkylthio or aryloxy, or

        -   c) N-terminal-deblocked didepsipeptides of the general             formula (Ib)

-   -   -    in which             -   the radicals R¹, R², R³, R⁴, R⁵ and B have the meaning                 indicated under item 2, are reacted, if appropriate in                 the presence of a catalyst, if appropriate in the                 presence of an acid-binding agent and if appropriate in                 the presence of a diluent, with compounds of the general                 formulae (V) or (VI)

-   -   -   -    in which                 -   the radicals R⁸, G¹, X, X¹ and Y have the meaning                     indicated under item 2, or                 -   for the preparation of the depsipeptides of the                     general formula (Ia) and their salts                 -   in which the group

-   -   -   -    represents carboxyl and Y represents oxygen,

        -   d) N-terminal-deblocked didepsipeptides of the general             formula (Ib)

-   -   -    in which             -   the radicals R¹, R², R³, R⁴, R⁵ and B have the meaning                 indicated under item 2,             -   are reacted in a first reaction step with carbon dioxide                 and an alkali metal carbonate of the formula (VII)                 M₂CO₃  (viI)             -    in which                 -   M represents a monovalent alkali metal cation,                     preferably lithium, sodium, potassium or caesium, in                     particular potassium or caesium,                 -   then in a second reaction step the resulting alkali                     metal salt of the formula (VIII)

-   -   -   -   -   in which                 -   the radicals R¹, R², R³, R⁴, R⁵ and B have the                     meaning indicated under item 2,                 -   M represents a metal cation equivalent bound like a                     salt,                 -   is reacted with alkylating agents of the formula                     (IX)                     R⁸-Hal  (IX)                 -    in which                 -   R⁸ has the meaning indicated under item 2 and                 -   Hal represents a halogen such as fluorine, chlorine,                     bromine or iodine,                 -   if appropriate in the presence of a diluent and if                     appropriate in the presence of a basic reaction                     auxiliary, or

        -   e) didepsipeptides of the general formula (Ic)

-   -   -    in which             -   the radicals R¹, R², R³, R⁴, R⁵, G, W, X and B and have                 the meaning indicated under item 2 and 3b, are reacted,                 if appropriate in the presence of a catalyst, if                 appropriate in the presence of an acid-binding agent and                 if appropriate in the presence of a diluent, with                 compounds of the general formula (X)                 R⁸—Y—H  (X)             -    in which                 -   the radicals R⁸ and Y have the meaning indicated                     above under item 2, or         -   f) didepsipeptides of the general formula (Id)

-   -   -    in which             -   the radicals R¹, R², R³, R⁴, R⁵, G, Q, X and B have the                 meaning indicated under item 2, or their                 carboxyl-activated derivatives or their alkali metal                 salts are reacted, if appropriate in the presence of a                 catalyst, if appropriate in the presence of an                 acid-binding agent and if appropriate in the presence of                 a diluent, with compounds of the general formula (XI)                 H—B  (XI)             -    in which                 -   the radical B has the meaning indicated above under                     item 2.

Formula (I) provides a general definition of the substituted didepsipeptides according to the invention and their salts.

The substituted didepsipeptides of the formula (I) according to the invention and their acid addition salts and metal salt complexes have very good endoparasiticidal, in particular anthelmintic, action and can preferably be employed in the field of veterinary medicine.

Optionally substituted alkyl on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched alkyl preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are optionally substituted methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 1,2-dimethylpropyl, 1-1-dimethylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl, 2,3-dimethylbutyl, 1,1-dimethylbutyl, 2,2-dimethylbutyl, 3,3-dimethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethylbutyl and 2-ethylbutyl. Preferably mention may be made of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl and tert-butyl.

Optionally substituted alkenyl on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched alkenyl preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are substituted vinyl, 2-propenyl, 2-butenyl, 3-butenyl, 1-methyl-2-propenyl, 2-methyl-2-propenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-methyl-2-butenyl, 2-methyl-2-butenyl, 3-methyl-2-butenyl, 1-methyl-3-butenyl, 2-methyl-3-butenyl, 3-methyl-3-butenyl, 1,1-dimethyl-2-propenyl, 1,2-dimethyl-2-propenyl, 1-ethyl-2-propenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, 5-hexenyl, 1-methyl-2-pentenyl, 2-methyl-2-pentenyl, 3-methyl-2-pentenyl, 4-methyl-2-pentenyl, 3-methyl-3-pentenyl, 4-methyl-3-pentenyl, 1-methyl-4-pentenyl, 2-methyl-4-pentenyl, 3-methyl-4-pentenyl, 4-methyl-4-pentenyl, 1,1-dimethyl-2-butenyl, 1,1-dimethyl-3-butenyl, 1,2-dimethyl-2-butenyl, 1,2-dimethyl-3-butenyl, 1,3-dimethyl-2-butenyl, 1,3-dimethyl-3-butenyl, 2,2-dimethyl-3-butenyl, 2,3-dimethyl-2-butenyl, 2,3-dimethyl-3-butenyl, 1-ethyl-2-butenyl, 1-ethyl-3-butenyl, 2-ethyl-2-butenyl, 2-ethyl-3-butenyl, 1,1,2-trimethyl-2-propenyl, 1-ethyl-1-methyl-2-propenyl and 1-ethyl-2-methyl-2-propenyl. Preferably mention may be made of optionally substituted ethenyl, 2-propenyl, 2-butenyl or 1-methyl-2-propenyl.

Optionally substituted alkinyl on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched alkinyl preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are substituted ethinyl, 2-propinyl, 2-butinyl, 3-butinyl, 1-methyl-2-propinyl, 2-pentinyl, 3-pentinyl, 4-pentinyl, 1-methyl-3-butinyl, 2-methyl-3-butinyl, 1-methyl-2-butinyl, 1,1-dimethyl-2-propinyl, 1-ethyl-2-propinyl, 2-hexinyl, 3-hexinyl, 4-hexinyl, 5-hexinyl, 1-methyl-2-pentinyl, 1-methyl-3-pentinyl, 1-methyl-4-pentinyl, 2-methyl-3-pentinyl, 2-methyl-4-pentinyl, 3-methyl-4-pentinyl, 4-methyl-2-pentinyl, 1,1-dimethyl-2-butinyl, 1,1-dimethyl-3-butinyl, 1,2-dimethyl-3-butinyl, 2,2-dimethyl-3-butinyl, 1-ethyl-3-butinyl, 2-ethyl-3-butinyl and 1-ethyl-1-methyl-2-propinyl.

Preferably mention may be made of optionally substituted ethinyl, 2-propinyl or 2-butinyl.

Optionally substituted cycloalkyl on its own or as a constituent of a radical in the general formulae denotes mono-, bi- and tricyclic cycloalkyl, preferably having 3 to 10, in particular having 3, 5 or 7, carbon atoms. Examples which may be mentioned are substituted cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl and adamantyl.

Halogenoalkyl on its own or as a constituent of a radical in the general formulae contains 1 to 4, in particular 1 or 2, carbon atoms and preferably 1 to 9, in particular 1 to 5, identical or different halogen atoms preferably fluorine, chlorine and bromine, in particular fluorine and chlorine. Examples which may be mentioned are trifluoromethyl, trichloromethyl, chlorodifluoromethyl, dichlorofluoromethyl, chloromethyl, bromomethyl, 1-fluoroethyl, 2-fluoroethyl, 2,2-difluoroethyl, 2,2,2-trifluoroethyl, 2,2,2-trichloroethyl, 2-chloro-2,2-difluoroethyl, pentafluoroethyl and pentafluoro-tert-butyl.

Optionally substituted alkoxy on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched alkoxy preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are optionally substituted methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy and tert-butoxy.

Optionally substituted halogenoalkoxy on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched halogenoalkoxy preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are optionally substituted difluoromethoxy, trifluoromethoxy, trichloromethoxy, chlorodifluoromethoxy, 1-fluoroethoxy, 2-fluoroethoxy, 2,2-difluoroethoxy, 1,1,2,2-tetrafluoroethoxy, 2,2,2-trifluoroethoxy and 2-chloro-1,1,2-trifluoroethoxy.

Optionally substituted alkylthio on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched alkylthio preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are optionally substituted methylthio, ethylthio, n-propylthio, isopropylthio, n-butylthio, isobutylthio, sec-butylthio and tert-butylthio.

Optionally substituted halogenoalkylthio on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched halogenoalkylthio preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are optionally substituted difluoromethylthio, trifluoromethylthio, trichloromethylthio, chlorodifluoromethylthio, 1-fluoroethylthio, 2-fluoroethylthio, 2,2-di-fluoroethylthio, 1,1,2,2-tetrafluoroethylthio, 2,2,2-trifluoroethylthio and 2-chloro-1,1,2-trifluoroethylthio.

Optionally substituted alkylcarbonyl on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched alkylcarbonyl having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are optionally substituted methylcarbonyl, ethylcarbonyl, n-propylcarbonyl, isopropylcarbonyl, n-butylcarbonyl, isobutylcarbonyl, sec-butylcarbonyl and tert-butylcarbonyl.

Optionally substituted cycloalkylcarbonyl on its own or as a constituent of a radical in the general formulae denotes mono-, bi- and tricyclic cycloalkylcarbonyl, preferably having 3 to 10, in particular having 3, 5 or 7, carbon atoms. Examples which may be mentioned are optionally substituted cyclopropylcarbonyl, cyclobutylcarbonyl, cyclopentylcarbonyl, cyclohexylcarbonyl, cycloheptylcarbonyl, cyclooctylcarbonyl, bicyclo[2.2.1]heptylcarbonyl, bicyclo[2.2.2]octylcarbonyl and adamantylcarbonyl.

Optionally substituted alkoxycarbonyl on its own or as a constituent of a radical in the general formulae denotes straight-chain or branched alkoxycarbonyl preferably having 1 to 6, in particular 1 to 4, carbon atoms. Examples which may be mentioned are optionally substituted methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl, isopropoxycarbonyl, n-butoxycarbonyl, isobutoxycarbonyl, sec-butoxycarbonyl and tert-butoxycarbonyl.

Aryl is, for example, a mono-, bi- or polynuclear aromatic radical such as phenyl, naphthyl, tetrahydronaphthyl, indanyl, fluorenyl and the like, preferably phenyl or naphthyl.

Optionally substituted aryl in the general formulae denotes phenyl or naphthyl which is preferably optionally substituted, in particular phenyl.

Optionally substituted arylalkyl in the general formulae denotes arylalkyl which is preferably optionally substituted in the aryl moiety and/or alkyl, preferably having 6 or 10, in particular 8, carbon atoms in the aryl moiety (preferably phenyl or naphthyl, in particular phenyl) and preferably 1 to 4, in particular 1 or 2, carbon atoms in the alkyl moiety, where the alkyl moiety can be straight-chain or branched. Examples which may preferably be mentioned are optionally substituted benzyl and phenylethyl.

Optionally substituted hetaryl on its own or as a constituent of a radical in the general formulae denotes 5- to 7-membered rings preferably having 1 to 3, in particular 1 or 2, identical or different heteroatoms. Heteroatoms in the heteroaromatics are oxygen, sulphur or nitrogen. Examples which may preferably be mentioned are optionally substituted furyl, thienyl, pyrazolyl, imidazolyl, 1,2,3- and 1,2,4-triazolyl, isoxazolyl, thiazolyl, isothiazolyl, 1,2,3-, 1,3,4-, 1,2,4- and 1,2,5-oxadiazolyl, azepinyl, piperidyl, pyrrolyl, pyridyl, piperazinyl, pyridazinyl, pyrimidinyl, pyrazinyl, 1,3,5-, 1,2,4- and 1,2,3-triazinyl, 1,2,4-, 1,3,2-, 1,3,6- and 1,2,6-oxazinyl, oxepinyl, thiepinyl and 1,2,4-diazepinyl.

The optionally substituted radicals of the general formulae can carry one or more, preferably 1 to 3, in particular 1 or 2, identical or different substituents. Examples of substituents which may preferably be mentioned are:

-   -   alkyl preferably having 1 to 4, in particular 1 to 2, carbon         atoms, such as methyl, ethyl, n-propyl, isopropyl, n-butyl,         isobutyl, sec-butyl and tert-butyl; alkoxy preferably having 1         to 4, in particular 1 to 2 carbon atoms, such as methoxy,         ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy         and tert-butoxy; alkylthio such as methylthio, ethylthio,         n-propylthio, isopropylthio, n-butylthio, isobutylthio,         sec-butylthio and tert-butylthio; halogenoalkyl preferably         having 1 to 4, in particular 1 to 2 carbon atoms and preferably         1 to 5, in particular 1 to 3, halogen atoms, where the halogen         atoms are identical or different and, as halogen atoms, are         preferably fluorine, chlorine or bromine, in particular fluorine         or chlorine, such as difluoromethyl, trifluoromethyl,         trichloromethyl; hydroxyl; halogen, preferably fluorine,         chlorine, bromine and iodine, in particular fluorine and         chlorine; cyano; nitro; amino; monoalkyl- and dialkylamino         preferably having 1 to 4, in particular 1 or 2 carbon atoms per         alkyl group, such as methylamino, methylethylamino,         dimethyl-amino, n-propyl-amino, isopropylamino,         methyl-n-butylamino; alkylcarbonyl radicals such as         methylcarbonyl; alkoxycarbonyl preferably having 2 to 4, in         particular 2 to 3, carbon atoms, such as methoxycarbonyl and         ethoxycarbonyl; alkylsulphinyl having 1 to 4, in particular 1 to         2, carbon atoms; halogenosulphinyl having 1 to 4, in particular         1 to 2, carbon atoms and 1 to 5 halogen atoms, such as         trifluoromethylsilphinyl; sulphonyl (—SO₂—OH); alkylsulphonyl         preferably having 1 to 4, in particular 1 or 2, carbon atoms,         such as methylsulphonyl and ethylsulphonyl;         halogenoalkylsulphonyl having 1 to 4, in particular 1 to 2,         carbon atoms and 1 to 5 halogen atoms, such as         trifluoromethylsulphonyl, perfluoro-n-butylsulphonyl,         perfluoroisobutylsulphonyl; arylsulphonyl preferably having 6 or         10 aryl carbon atoms, such as phenylsulphonyl; acyl, aryl,         aryloxy, hetaryl, hetaryloxy, which for their part can carry one         of the abovementioned substituents, and the formimino radical         (—HC═N—O-alkyl).

Suitable cyclic amino groups are heteroaromatic or aliphatic ring systems having one or more nitrogen atoms as heteroatom, in which the heterocycles can be saturated or unsaturated, a ring system or several fused ring systems, and optionally contain further heteroatoms such as nitrogen, oxygen and sulphur etc. Additionally, cyclic amino groups can also denote a spiro ring or a bridged ring system. The number of atoms which form cyclic amino groups is not restricted, for example they consist in the case of a one-ring system of 3 to 8 atoms and in the case of a three-ring system of 7 to 11 atoms.

Examples of cyclic amino groups having saturated and unsaturated monocyclic groups having a nitrogen atom as heteroatom which may be mentioned are 1-azetidinyl, pyrrolidino, 2-pyrrolin-1-yl, 1-pyrrolyl, piperidino, 1,4-dihydropyridin-1-yl, 1,2,5,6-tetrahydropyridin-1-yl, homopiperidino; examples of cyclic amino groups having saturated and unsaturated monocyclic groups having two or more nitrogen atoms as heteroatoms which may be mentioned are 1-imidazolidinyl, 1-imidazolyl, 1-pyrazolyl, 1-triazolyl, 1-tetrazolyl, 1-piperazinyl, 1-homopiperazinyl, 1,2-dihydro-pyridazin-1-yl, 1,2-dihydropyrimidin-1-yl, perhydropyrimidin-1-yl and 1,4-diazacycloheptan-1-yl; examples of cyclic amino groups having saturated and unsaturated monocyclic groups having one to three nitrogen atoms and one to two sulphur atoms as heteroatoms which may be mentioned are thiazolidin-3-yl, isothiazolin-2-yl, thiomorpholino or dioxothiomorpholino; examples of cyclic amino groups having saturated and unsaturated fused cyclic groups which may be mentioned are indol-1-yl, 1,2-dihydrobenzimidazol-1-yl, perhydropyrrolo[1,2-a]pyrazin-2-yl; an example of cyclic amino groups having spirocyclic groups which may be mentioned is 2-azaspiro[4,5]decan-2-yl; an example of cyclic amino group-bridged heterocyclic groups which may be mentioned is 2-azabicyclo[2,2,1]heptan-7-yl.

Preferred compounds are those of the formula (Ia) and their salts

in which

-   -   R¹ represents hydrogen, straight-chain or branched C₁₋₆-alkyl,         in particular methyl, ethyl, propyl, isopropyl, sec-butyl,         tert-butyl, C₃₋₆-cycloalkyl, in particular cyclopropyl,         cyclobutyl, cyclopentyl, cyclohexyl, aryl-C₁₋₂-alkyl, in         particular phenylmethyl or hetaryl-C₁₋₂-alkyl, in particular         pyridylmethyl and thiazolylmethyl, each of which is optionally         substituted, and     -   R¹ and R² together with the atoms to which they are bonded         represent a 5- or 6-membered ring which can optionally be         interrupted by sulphur and is optionally substituted by         hydroxyl,     -   R² represents hydrogen, straight-chain or branched alkyl having         up to 6 carbon atoms, in particular methyl, ethyl, propyl,         isopropyl, sec-butyl, tert-butyl, hydroxy-C₁₋₂-alkyl, in         particular hydroxymethyl, 1-hydroxyethyl,         C₁₋₄-alkanoyloxy-C₁₋₄-alkyl, in particular acetoxymethyl,         1-acetoxyethyl, C₁₋₄-alkoxy-C₁₋₄-alkyl, in particular         methoxymethyl, 1-methoxyethyl, aryl-C₁₋₄-alkoxy-C₁₋₄-alkyl, in         particular benzyloxymethyl, 1-benzyloxymethyl,         mercapto-C₁₋₄-alkyl, in particular mercaptomethyl,         C₁₋₄-alkylthio-C₁₋₄-alkyl, in particular methylsulphinylmethyl,         C₁₋₄-alkylsulphonyl-C₁₋₄-alkyl, in particular         methylsulphonylethyl, carboxy-C₁₋₄-alkyl, in particular         carboxymethyl, carboxyethyl, C₁₋₄-alkoxycarbonyl-C₁₋₄-alkyl, in         particular methoxycarbonylmethyl, ethoxycarbonylmethyl,         aryl-C₁₋₄-alkoxycarbonyl-C₁₋₄-alkyl, in particular         benzyloxycarbonylmethyl, carbamoyl-C₁₋₄-alkyl, in particular         carbamoylmethyl, carbamoylethyl, amino-C₁₋₄-alkyl, in particular         aminopropyl, aminobutyl, C₁₋₄-alkylamino-C₁₋₄-alkyl, in         particular methylaminopropyl, methylaminobutyl,         C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular dimethylaminopropyl,         dimethylaminobutyl, guanido-C₁₋₄-alkyl, in particular         guanidopropyl, C₁₋₄-alkoxycarbonylamino-C₁₋₄-alkyl, in         particular tert-butylcarbonylaminopropyl,         tert-butylcarbonylaminobutyl, alkenyl having up to 6 carbon         atoms, in particular vinyl, 2-propenyl, 2-butenyl,         1-methyl-2-propenyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, in particular         cyclopropylmethyl, cyclobutylmethyl, cyclohexylmethyl,         hetaryl-C₁₋₂-alkyl, in particular benzo-[b]thien-1-yl-methyl,         benzo[b]-thien-3-yl, pyrid-2-yl-methyl, pyrid-3-yl-methyl,         pyrid-4-yl-methyl, fur-2-yl-methyl, fur-3-yl-methyl,         thien-2-yl-methyl, thien-3-yl-methyl, indol-3-yl-methyl,         N-methyl-indol-3-yl-methyl, imidazol-4-yl-methyl,         N-methylimidazol-4-yl-methyl, aryl-C₁₋₂-alkyl, in particular         benzyl, each of which can optionally be substituted by radicals         from the series consisting of halogen, in particular, fluorine,         chlorine, bromine or iodine, hydroxyl, C₁₋₄-alkyl, in particular         methyl or tert-butyl, C₁₋₄-halogenoalkyl, in particular         trifluoromethylethyl, difluoromethyl or trichloromethyl,         C₁₋₄-alkoxy, in particular methoxy, ethoxy or tert-butyloxy,         C₁₋₄-halogenoalkoxy, in particular Trifluoromethoxy,         difluoromethoxy, C₁₋₄-alkylthio, in particular methylthio,         C₁₋₄-halogenoalkylthio, in particular trifluoromethylthio,         C₁₋₂-alkylenedioxy, in particular methylenedioxy or         ethylenedioxy, nitro, amino, C₁₋₄-alkylamino, in particular         methylamino, C₁₋₄-di-alkylamino, in particular dimethylamino,         C₃₋₆-cycloalkylamino, in particular pyrrolidino, piperidino,         C₃₋₆-cycloalkylthioamino, in particular thiomorpholino and         dioxothiomorpholino, C₃₋₆-cycloalkyldiamino, in particular         N-methylpiperazino, and     -   R³ and R⁴ represent hydrogen,     -   R⁵ represents hydrogen, straight-chain or branched alkyl having         up to 6 carbon atoms, in particular methyl, ethyl, propyl,         isopropyl, sec-butyl, tert-butyl, hydroxy-C₁₋₂-alkyl, in         particular hydroxymethyl, 1-hydroxyethyl,         C₁₋₄-alkanoyloxy-C₁₋₄-alkyl, in particular acetoxymethyl,         1-acetoxyethyl, C₁₋₄-alkoxy-C₁₋₄-alkyl, in particular         methoxymethyl, 1-methoxyethyl, aryl-C₁₋₄-alkoxy-C₁₋₄-alkyl, in         particular benzyloxymethyl, 1-benzyloxymethyl,         mercapto-C₁₋₄-alkyl, in particular mercaptomethyl,         C₁₋₄-alkylthio-C₁₋₄-alkyl, in particular methylsulphinylmethyl,         C₁₋₄-alkylsulphonyl-C₁₋₄-alkyl, in particular         methylsulphonylethyl, carboxy-C₁₋₄-alkyl, in particular         carboxymethyl, carboxyethyl, C₁₋₄-alkoxycarbonyl-C₁₋₄-alkyl, in         particular methoxycarbonylmethyl, ethoxycarbonylmethyl,         aryl-C₁₋₄-alkoxycarbonyl-C₁₋₄-alkyl, in particular         benzyloxycarbonylmethyl, carbamoyl-C₁₋₄-alkyl, in particular         carbamoylmethyl, carbamoylethyl, amino-C₁₋₄-alkyl, in particular         aminopropyl, aminobutyl, C₁₋₄-alkylamino-C₁₋₄-alkyl, in         particular methylaminopropyl, methylaminobutyl,         C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular dimethylaminopropyl,         dimethylaminobutyl, guanido-C₁₋₄-alkyl, in particular         guanidopropyl, C₁₋₄-alkoxycarbonylamino-C₁₋₄-alkyl, in         particular tert-butylcarbonylaminopropyl,         tert-butylcarbonylaminobutyl, alkenyl having up to 6 carbon         atoms, in particular vinyl, 2-propenyl, 2-butenyl,         1-methyl-2-propenyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, in particular         cyclopropylmethyl, cyclobutylmethyl, cyclohexylmethyl,         hetaryl-C₁₋₂-alkyl, in particular benzo-[b]thien-1-yl-methyl,         benzo[b]-thien-3-yl, pyrid-2-yl-methyl, pyrid-3-yl-methyl,         pyrid-4-yl-methyl, fur-2-yl-methyl, fur-3-yl-methyl,         thien-2-yl-methyl, thien-3-yl-methyl, indol-3-yl-methyl,         N-methyl-indol-3-yl-methyl, imidazol-4-yl-methyl,         N-methylimidazol-4-yl-methyl, aryl-C₁₋₂-alkyl, in particular         benzyl, each of which can optionally be substituted by radicals         from the series consisting of halogen, in particular fluorine,         chlorine, bromine or iodine, hydroxyl, C₁₋₄-alkyl, in particular         methyl or tert-butyl, C₁₋₄-halogenoalkyl, in particular         trifluoromethylethyl, difluoromethyl or trichloromethyl,         C₁₋₄-alkoxy, in particular methoxy, ethoxy or tert-butyloxy,         C₁₋₄-halogenoalkoxy, in particular trifluoromethoxy,         difluoromethoxy, C₁₋₄-alkylthio, in particular methylthio,         C₁₋₄-halogenoalkylthio, in particular trifluoromethylthio,         C₁₋₂-alkylenedioxy, in particular methylenedioxy or         ethylenedioxy, nitro, amino, C₁₋₄-alkylamino, in particular         methylamino, C₁₋₄-dialkylamino, in particular dimethylamino,         C₃₋₆-cycloalkylamino, in particular pyrrolidino, piperidino,         C₃₋₆-cycloalkylthioamino, in particular thiomorpholino and         dioxothiomorpholino, C₃₋₆-cycloalkyldiamino, in particular         N-methylpiperazino, and

-   -    represents carboxyl, thiocarboxyl, —CH═CH—NO₂, —C═CH—CN,         —C═N—R⁶,     -   sulphoxyl, sulphonyl, —P(O)—OR⁷ or P(S)—OR⁷,         -   R⁶ represents hydrogen, hydroxyl, C₁₋₄-alkoxy, in particular             methoxy, ethoxy, sec-butyloxy, C₁₋₄-alkylcarbonyl, in             particular methylcarbonyl, ethylcarbonyl,             C₁₋₄-halogenoalkylcarbonyl, in particular             trifluoromethylcarbonyl, trichloromethylcarbonyl,             C₁₋₄-alkylsulphonyl, in particular methylsulphonyl,             ethylsulphonyl, propylsulphonyl, nitro or cyano, and         -   R⁷ represents hydrogen or C₁₋₄-alkyl, in particular methyl             or ethyl, and     -   Q represents straight-chain or branched C₁₋₄-alkyl, in         particular methyl, ethyl, propyl, isopropyl, sec-butyl,         tert-butyl, C₁₋₄-halogenoalkyl, in particular trifluoromethyl,         trichloromethyl, chlorodifluoromethyl, dichlorofluoromethyl,         1-fluoroethyl, chloromethyl, bromomethyl, 1-fluoroethyl,         2,2,2-trifluoroethyl, 2,2,2-trichloroethyl, C₂₋₆-alkenyl, in         particular vinyl, 2-propenyl, 1-methyl-2-propenyl and 2-butenyl,         C₂₋₆-halogenoalkenyl, in particular difluorovinyl,         dichlorovinyl, 2-chloro-2-propenyl, 2,3,3-trifluoro-2-propenyl,         2,3,3-trichloro-2-propenyl, 4,4-difluoro-3-butenyl,         C₃₋₆-cycloalkyl, in particular cyclopropyl, cyclobutyl,         cyclopentyl and cyclohexyl, hetaryl-C₁₋₂-alkyl, in particular         pyridylmethyl and thiazolylmethyl, each of which can optionally         be substituted by radicals from the series consisting of         halogen, in particular fluorine, chlorine, bromine or iodine,         hydroxyl, C₁₋₄-alkyl, in particular methyl or tert-butyl,         C₁₋₄-halogenoalkyl, in particular trifluoromethyl,         difluoromethyl or trichloromethyl, C₁₋₄-alkoxy, in particular         methoxy, C₁₋₄-halogenoalkoxy, in particular trifluoromethoxy,         difluoromethoxy, C₁₋₄-alkylthio, in particular methylthio,         C₁₋₄-halogenoalkylthio, in particular trifluoromethylthio,         nitro, amino, C₁₋₄-alkylamino, in particular methylamino,         C₁₋₄-dialkylamino, in particular dimethylamino, or     -    optionally represents a radical from the group G² and G³

-   -    in which

-   -   -    can denote carboxyl, thiocarboxyl or sulphonyl,         -   Y represents oxygen, sulphur or —NR⁹,         -   R⁸ in the case where Y represents nitrogen [lacuna] a cyclic             amino group linked via a nitrogen atom, in particular             1-azetidinyl, pyrrolidino, 2-pyrrolin-1-yl, 1-pyrrolyl,             piperidino, 1,4-dihydropyridin-1-yl, 1-imidazolidiyl,             1-imidazolyl, 1-pyrazolyl, 1-triazolyl, 1-tetrazolyl,             1-piperazinyl, 1-homopiperazinyl,             1,2-dihydro-pyridazin-1-yl, 1,2-dihydropyrimidin-1-yl,             perhydropyrimidin-1-yl, 1,4-diazacyclo-heptan-1-yl,             thiazolidin-3-yl, isothiazolin-2-yl, morpholino,             thiomorpholino, dioxothiomorpholino, each of which is             optionally substituted by radicals from the series             consisting of halogen, in particular fluorine, chlorine,             bromine or iodine, C₁₋₄-alkyl, in particular methyl,             hydoxy-C₁₋₄-alkyl, in particular hydroxymethyl,             amino-C₁₋₄-alkyl, in particular aminomethyl, aminoethyl,             C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular             methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminomethyl, dimethylaminoethyl, amino, hydroxyl,             C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylcarbonyl, in             particular methylcarbonyl, C₁₋₄-alkoxycarbonyl, in             particular methoxycarbonyl,         -   R⁸ and R⁹ independently of one another represent hydrogen,             straight-chain or branched C₁₋₄-alkyl, in particular methyl,             ethyl, propyl, isopropyl, sec-butyl, tert-butyl,             C₂₋₄-alkenyl, in particular vinyl, 2-propenyl,             1-methyl-2-propenyl and 2-butenyl, C₂₋₄-alkinyl, in             particular ethinyl, 2-propinyl and 2-butinyl,             C₃₋₆-cycloalkyl, in particular cyclopropyl, cyclobutyl,             cyclopentyl and cyclohexyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, in             particular cyclopropylmethyl, cyclobutylmethyl,             cyclopentylmethyl and cyclohexylmethyl, hetaryl, in             particular pyridyl and thiazolyl, hetaryl-C₁₋₂-alkyl, in             particular pyridylmethyl and thiazolylmethyl, each of which             can optionally be substituted by radicals from the series             consisting of halogen, in particular fluorine, chlorine,             bromine or iodine, C₁₋₄-alkyl, in particular methyl,             hydoxy-C₁₋₄-alkyl, in particular hydroxymethyl,             amino-C₁₋₄-alkyl, in particular aminomethyl, aminoethyl,             C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular             methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminomethyl, dimethylaminoethyl, amino, hydroxyl,             C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylcarbonyl, in             particular methylcarbonyl, C₁₋₄-alkoxycarbonyl, in             particular methoxycarbonyl, or         -   R⁸ and R⁹ together with the adjacent N atom represent a             carbocyclic 5-, 6- or 7-membered ring system or a 7 to             10-membered bicyclic ring system which can optionally also             be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl,             carbonyl, —N—O, —N═, —NR¹¹— or by quaternized nitrogen and             is optionally substituted by C₁₋₄-alkyl, in particular             methyl, hydoxy-C₁₋₄-alkyl, in particular hydroxymethyl,             amino-C₁₋₄-alkyl, in particular aminomethyl, aminoethyl,             C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular             methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminomethyl, dimethylaminoethyl, amino, hydroxyl,             C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylcarbonyl, in             particular methylcarbonyl, C₁₋₄-alkoxycarbonyl, in             particular methoxycarbonyl, halogen, in particular fluorine,             chlorine, bromine or iodine,         -   R¹⁰ represents hydrogen or C₁₋₄-alkyl, in particular methyl,             ethyl, propyl, isopropyl, sec-butyl, tert-butyl, and         -   R¹¹ represents hydrogen, straight-chain or branched             C₁₋₆-alkyl, in particular methyl, ethyl, propyl, isopropyl,             sec-butyl, tert-butyl, C₂₋₆-alkenyl, in particular vinyl,             2-propenyl, 1-methyl-2-propenyl and 2-butenyl, C₂₋₆-alkinyl,             in particular ethinyl, 2-propinyl and 2-butinyl,             C₃₋₆-cycloalkyl, in particular cyclopropyl, cyclobutyl,             cyclopentyl and cyclohexyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, in             particular cyclopropylmethyl, cyclobutylmethyl,             cyclopentylmethyl and cyclohexylmethyl, C₁₋₄-alkylcarbonyl,             in particular methylcarbonyl, ethylcarbonyl,             n-propylcarbonyl, isopropylcarbonyl, n-butylcarbonyl,             isobutylcarbonyl, sec-butylcarbonyl, tert-butylcarbonyl,             C₃₋₆-cycloalkylcarbonyl, in particular cyclopropylcarbonyl,             cyclobutylcarbonyl, cyclopentylcarbonyl and             cyclohexylcarbonyl, C₁₋₄-alkoxycarbonyl, in particular             methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl,             isopropoxycarbonyl, n-butoxycarbonyl, isobutoxycarbonyl,             sec-butoxycarbonyl, tert-butoxycarbonyl, hydoxy-C₁₋₄-alkyl,             in particular hydroxymethyl, hydroxyethyl,             hydroxyethylsulphonylethyl, C₁₋₄-alkylamino, in particular             methylamino, ethylamino, C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in             particular methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminomethyl, dimethylaminoethyl,             dimethylaminopropyl, C₃₋₇-cycloalkylamino-C₁₋₄-alkyl, in             particular N-pyrrolidinoethyl, N-morpholinoethyl,             N-piperidinoethyl, N-thiomorpholinoethyl,             N¹-(N⁴-methylpiperazino)ethyl,             C₃₋₆-cycloalkylaminocarbonyl-C₁₋₂-alkyl, in particular             N-morpholinocarbonylmethyl, cyano, aryl, in particular             phenyl, aryl-C₁₋₂-alkyl, in particular phenylmethyl,             hetaryl, in particular pyridyl or thiazolyl,             hetaryl-C₁₋₂-alkyl, in particular pyridylmethyl and             thiazolylmethyl, each of which can optionally be substituted             by radicals from the series consisting of halogen, in             particular fluorine, chlorine, bromine or iodine,             C₁₋₄-alkyl, in particular methyl, C₁₋₄-halogenoalkyl, in             particular trifluoromethyl, trichloromethyl, amino,             hydroxyl, C₁₋₄-alkoxy, in particular methoxy,             C₁₋₂-alkylenedioxy, in particular methylenedioxy or             ethylenedioxy, C₁₋₄-halogenoalkoxy, in particular             trifluoromethoxy, difluoromethoxy, C₁₋₄-alkylthio, in             particular methylthio, C₁₋₄-halogenoalkylthio, in particular             trifluoromethylthio, C₁₋₄-alkylsulphonyl in particular             methylsulphonyl, C₁₋₄-alkylamino, in particular methylamino,             di-C₁₋₄-alkylamino, in particular dimethylamino,             C₁₋₄-alkylcarbonyl, in particular methylcarbonyl,             C₁₋₄-alkoxycarbonyl, in particular methoxycarbonyl         -   B represents straight-chain or branched C₁₋₆-alkoxy, in             particular methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy,             isobutoxy, sec-butoxy and tert-butoxy, C₂₋₆-alkenyloxy,             vinyloxy, 2-propenyloxy, 2-butenyloxy, 3-butenyloxy,             1-methyl-2-propenyloxy, 2-methyl-2-propenyloxy,             2-pentenyloxy, 1-methyl-2-butenyloxy, 2-methyl-2-butenyloxy,             3-methyl-2-butenyloxy, 1-methyl-3-butenyloxy,             1,1-dimethyl-2-propenyloxy, 1,2-dimethyl-2-propenyloxy,             1-ethyl-2-propenyloxy, 2-hexenyloxy,             1,1-dimethyl-2-butenyloxy, 1,2-dimethyl-2-butenyloxy,             1-ethyl-2-butenyloxy, C₂₋₆-alkinyloxy, in particular             ethinyloxy, 2-propinyloxy, 2-butinyloxy, 3-butinyloxy,             1-methyl-2-propinyloxy, 2-pentinyloxy, 1-methyl-3-butinyl,             2-methyl-3-butinyloxy, 1,1-dimethyl-2-propinyloxy,             1-ethyl-2-propinyloxy and 1-methyl-2-pentinyloxy,             C₃₋₈-cycloalkyloxy, in particular cyclopropyloxy,             cyclobutyloxy, cyclopentyloxy, cyclohexyloxy,             cycloheptyloxy, C₃₋₇-cycloalkyl-C₁₋₂-alkyloxy, in particular             cyclopropylmethoxy, cyclobutylmethoxy, cyclopentylmethoxy,             cyclohexylmethoxy, cycloheptylmethoxy, aryloxy-, in             particular phenoxy, aryl-C₁₋₂-alkyloxy, in particular             benzyloxy, hetaryloxy, in particular pyridyloxy,             hetaryl-C₁₋₂-alkyl-oxy, in particular pyridylmethyl and             thiazolylmethyl, each of which can optionally be substituted             by radicals from the series consisting of halogen, in             particular fluorine, chlorine, bromine or iodine,             C₁₋₄-alkyl, in particular methyl, C₁₋₄-halogenoalkyl, in             particular trifluoromethyl, trichloromethyl, amino,             hydroxyl, C₁₋₄-alkoxy, in particular methoxy,             C₁₋₂-alkylenedioxy, in particular methylenedioxy or             ethylenedioxy, C₁₋₄-halogenoalkoxy, in particular             trifluoromethoxy, difluoromethoxy, C₁₋₄-alkylthio, in             particular methylthio, C₁₋₄-halogenoalkylthio, in particular             trifluoromethylthio, C₁₋₄-alkylsulphonyl in particular             methylsulphonyl, C₁₋₄-alkylamino, in particular methylamino,             di-C₁₋₄-alkylamino, in particular dimethylamino,             C₃₋₆-cycloalkylamino, in particular pyrrolidino, piperidino,             C₃₋₆cycloalkyloxamino, in particular morpholino,             C₃₋₆-cycloalkylthioamino, in particular thiomorpholino and             dioxothiomorpholino, C₃₋₆-cycloalkyldiamino, in particular             N-methylpiperazino, C₁₋₄-alkylcarbonyl, in particular             methylcarbonyl, C₁₋₄-alkoxycarbonyl, in particular             methoxycarbonyl, or         -    represents the amino radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and             —NR¹⁵—OR¹⁶,         -    in which             -   R¹² and R¹³ independently of one another represent                 hydrogen, straight-chain or branched C₁₋₆-alkyl, in                 particular methyl, ethyl, n-propyl, isopropyl, n-butyl,                 isobutyl, sec-butyl, tert-butyl, pentyl, 1-methylbutyl,                 2-methylbutyl, 3-methylbutyl, 1,2-dimethylpropyl,                 1,1-dimethylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl,                 hexyl, 1-methylpentyl, C₁₋₆-alkylcarbonyl, in particular                 methylcarbonyl, ethylcarbonyl, n-propylcarbonyl,                 isopropylcarbonyl, n-butylcarbonyl, isobutylcarbonyl,                 sec-butylcarbonyl, tert-butylcarbonyl, pentylcarbonyl,                 1-methylbutylcarbonyl, 2-methylbutylcarbonyl,                 C₁₋₆-alkylsulphonyl, in particular methylsulphonyl,                 ethylsulphonyl, n-propylsulphonyl, isopropylsulphonyl,                 n-butylsulphonyl, isobutylsulphonyl, sec-butylsulphonyl,                 C₂₋₆-alkenyl, in particular vinyl, 2-propenyl,                 2-butenyl, 3-butenyl, 1-methyl-2-propenyl, 2-pentenyl,                 3-pentenyl, 1-methyl-2-butenyl, 2-methyl-2-butenyl,                 3-methyl-2-butenyl, 1,1-dimethyl-2-propenyl,                 1,2-dimethyl-2-propenyl, 1-ethyl-2-propenyl, 2-hexenyl,                 1,2-dimethyl-3-butenyl, 2,3-dimethyl-2-butenyl,                 1-ethyl-2-butenyl, 1-ethyl-3-butenyl, 2-ethyl-2-butenyl,                 2-ethyl-3-butenyl, C₂₋₆-alkinyl, in particular                 2-propinyl, 2-butinyl, 3-butinyl, C₃₋₈-cycloalkyl, in                 particular cyclopropyl, cyclobutyl, cyclopentyl,                 cyclohexyl, cycloheptyl, cyclooctyl,                 C₃₋₈-cycloalkyl-C₁₋₂-alkyl, in particular                 cyclopropylmethyl, cyclobutylmethyl, cyclopentylmethyl,                 cyclohexylmethyl, cycloheptylmethyl, hydoxy-C₁₋₄-alkyl,                 in particular hydroxymethyl, hydroxyethyl,                 hydroxyethylsulphonylethyl, C₁₋₄-alkylamino, in                 particular methylamino, ethylamino,                 C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular                 methylaminomethyl, methylaminoethyl, methylaminopropyl,                 C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular                 dimethylaminomethyl, dimethylaminoethyl,                 dimethylaminopropyl, C₃₋₇-cycloalkylamino-C₁₋₄-alkyl, in                 particular N-pyrrolidinoethyl, N-morpholinoethyl,                 N-piperidinoethyl, N-thiomorpholinoethyl,                 N¹-(N⁴-methyl-piperazino)-ethyl,                 C₃₋₆cycloalkylaminocarbonyl-C₁₋₂-alkyl, in particular                 N-morpholinocarbonylmethyl, aryl, in particular phenyl,                 aryl-C₁₋₂-alkyl, in particular benzyl and phenethyl,                 hetaryl, in particular pyridyl, thiazolyl,                 hetaryl-C₁₋₆-alkyl, in particular pyridylmethyl,                 thiazolylmethyl, each of which is optionally substituted                 by radicals from the series consisting of halogen, in                 particular fluorine, chlorine, bromine or iodine,                 hydroxyl, C₁₋₄-alkyl, in particular methyl or                 tert-butyl, C₁₋₄-alkoxy, in particular methoxy, ethoxy                 or tert-butyloxy, nitro, amino, C₁₋₄-alkylamino, in                 particular methylamino, C₁₋₄-dialkylamino, in particular                 dimethylamino, C₃₋₆-cycloalkylamino, in particular                 piperidino and morpholine or             -   R¹² and R¹³ together with the adjacent N atom represent                 a carbocyclic 5-, 6-, 7- or 8-membered ring system or a                 7 to 10-membered bicyclic ring system which can                 optionally also be interrupted by oxygen, sulphur,                 sulphoxyl, sulphonyl, carbonyl, —N—O—, —N═, —NR¹¹— or by                 quaternized nitrogen and is optionally substituted by                 aryl, in particular phenyl, C₁₋₄-alkyl, in particular                 methyl, hydoxy-C₁₋₄-alkyl, in particular hydroxymethyl,                 amino-C₁₋₄-alkyl, in particular aminomethyl, aminoethyl,                 C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular                 methylaminomethyl, methylaminoethyl,                 C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular                 dimethylaminomethyl, dimethylaminoethyl,                 C₃₋₆-cycloalkylamino, in particular pyrrolidino,                 piperidino or morpholino, amino, hydroxyl, cyano,                 C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylcarbonyl,                 in particular methylcarbonyl, C₁₋₄-alkoxycarbonyl, in                 particular methoxycarbonyl, halogen, in particular                 fluorine, chlorine, bromine or iodine, or             -    a radical from the groups G⁴, G⁵, G⁶, G⁷ and G⁸

-   -   -   -   in which             -   n can denote the numbers 0, 1, 2, 3 or 4,             -   R¹⁴ represents hydrogen, straight-chain or branched                 C₁₋₆-alkyl, methyl, ethyl, n-propyl, isopropyl, n-butyl,                 isobutyl, sec-butyl, tert-butyl, pentyl, 1-methylbutyl,                 2-methylbutyl, 3-methylbutyl, 1,2-dimethylpropyl,                 1,1-dimethylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl,                 hexyl, 1-methylpentyl, C₃₋₆-cycloalkyl, in particular                 cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, each                 of which is optionally substituted,             -   R¹⁵ and R¹⁶ independently of one another represent                 hydrogen, straight-chain or branched C₁₋₆-alkyl, in                 particular methyl, ethyl, n-propyl, iso-propyl, n-butyl,                 isobutyl, sec-butyl, tert-butyl, pentyl, 1-methylbutyl,                 2-methylbutyl, 3-methylbutyl, 1,2-dimethylpropyl,                 1,1-dimethylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl,                 hexyl, 1-methylpentyl, C₁₋₆-alkylcarbonyl, in particular                 methylcarbonyl, ethylcarbonyl, n-propylcarbonyl,                 isopropylcarbonyl, n-butylcarbonyl, isobutylcarbonyl,                 sec-butylcarbonyl, tert-butylcarbonyl, pentylcarbonyl,                 1-methylbutylcarbonyl, 2-methylbutylcarbonyl,                 C₂₋₆-alkenyl, in particular vinyl, 2-propenyl,                 2-butenyl, 3-butenyl, 1-methyl-2-propenyl, 2-pentenyl,                 3-pentenyl, 1-methyl-2-butenyl, 2-methyl-2-butenyl,                 3-methyl-2-butenyl, 1,1-dimethyl-2-propenyl,                 1,2-dimethyl-2-propenyl, 1-ethyl-2-propenyl, 2-hexenyl,                 1,2-dimethyl-3-butenyl, 2,3-dimethyl-2-butenyl,                 1-ethyl-2-butenyl, 1-ethyl-3-butenyl, 2-ethyl-2-butenyl,                 2-ethyl-3-butenyl, C₂₋₆-alkinyl, in particular                 2-propinyl, 2-butinyl, 3-butinyl, C₃₋₆-cycloalkyl, in                 particular cyclopropyl, cyclobutyl, cyclopentyl,                 cyclohexyl, each of which is optionally substituted,             -   R¹⁵ and R¹⁶ together with the adjacent N—O-group                 represent a carbocyclic 5-, 6- or 7-membered ring,                 with the proviso in the case where

    -   R¹ represents hydrogen and methyl, and

    -   R⁵ represents hydrogen and

-   -    represents carboxyl,     -   Q represents radicals other than methyl,     -   B represents radicals other than —NH₂, and     -   with the further proviso in the case where

-   -    represents carboxyl, and     -   G² represents tert-butyloxy, benzyloxy and 4-nitro-benzyloxy,     -   B represents radicals other than tert-butyloxy, benzyloxy and         4-nitro-benzyloxy,     -   and its optical isomers and racemates.

Particularly preferred compounds are those of the formula (Ia) and their salts

in which

-   -   R¹ represents hydrogen, straight-chain or branched C₁₋₄-alkyl,         in particular methyl, ethyl, C₃₋₆-cycloalkyl, in particular         cyclopropyl,     -   R² represents hydrogen, straight-chain or branched C₁₋₄-alkyl in         particular methyl, ethyl, propyl, isopropyl, sec-butyl,     -   R³ and R⁴ represent hydrogen,     -   R⁵ represents hydrogen, straight-chain or branched C₁₋₄-alkyl,         in particular methyl, ethyl, propyl, isopropyl, sec-butyl,         hetaryl-C₁₋₂-alkyl, in particular pyrid-2-yl-methyl,         pyrid-3-yl-methyl, pyrid-4-yl-methyl, thien-2-yl-methyl,         thien-3-yl-methyl, aryl-C₁₋₂-alkyl, in particular benzyl, each         of which can optionally be substituted by radicals from the         series consisting of halogen, in particular fluorine, chlorine,         bromine or iodine, hydroxyl, C₁₋₄-alkyl, in particular methyl,         or tert-butyl, C₁₋₄-alkoxy, in particular methoxy, ethoxy or         tert-butyloxy, C₁₋₂-alkylenedioxy, in particular methylenedioxy         or ethylenedioxy, nitro, amino, C₁₋₄-alkylamino, in particular         methylamino, C₁₋₄-dialkylamino, in particular dimethylamino,         C₃₋₆-cycloalkylamino, in particular pyrrolidino, piperidino,         C₃₋₆-cycloalkylthioamino, in particular thiomorpholino and         dioxothiomorpholino, C₃₋₆-cycloalkyldiamino, in particular         N-methyl-piperazino, and

-   -    represents carboxyl, —CH═CH—NO₂, —C═CH—CN, —C═N—R⁶ or         sulphonyl,         -   R⁶ represents C₁₋₄-halogenoalkylcarbonyl, in particular             trifluoromethylcarbonyl, trichloromethylcarbonyl,             alkyl-C₁₋₄-sulphonyl, in particular methylsulphonyl,             ethylsulphonyl, nitro or cyano, and     -   Q represents a radical from the group G² and G³

-   -    in which

-   -    can denote carboxyl or sulphonyl,     -   Y represents oxygen or —NR⁹,     -   R⁸ in the case where Y represents nitrogen denotes a cyclic         amino group linked via a nitrogen atom, in particular         pyrrolidino, 2-pyrrolin-1-yl, 1-pyrrolyl, piperidino,         1,4-dihydropyridin-1-yl, 1-piperazinyl, 1-homopiperazinyl,         morpholino, thiomorpholino, dioxothiomorpholino, each of which         can optionally be substituted by radicals from the series         consisting of halogen, in particular fluorine, chlorine, bromine         or iodine, C₁₋₄-alkyl, in particular methyl, hydoxy-C₁₋₄-alkyl,         in particular hydroxymethyl, amino-C₁₋₄-alkyl, in particular         aminomethyl, aminoethyl, C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in         particular methylaminomethyl, methylaminoethyl,         C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular dimethylaminomethyl,         dimethylaminoethyl, amino, hydroxyl, C₁₋₄-alkoxy, in particular         methoxy, C₁₋₄-alkylcarbonyl, in particular methylcarbonyl,         C₁₋₄-alkoxycarbonyl, in particular methoxycarbonyl,         -   R⁸ and R⁹ independently of one another represent             straight-chain or branched C₁₋₄-alkyl, in particular methyl,             ethyl, propyl, isopropyl, sec-butyl, C₂₋₄-alkenyl, in             particular vinyl, 2-propenyl, 1-methyl-2-propenyl,             C₂₋₄-alkinyl, in particular ethinyl, 2-propinyl,             C₃₋₆-cycloalkyl, in particular cyclopropyl,             hetaryl-C₁₋₂-alkyl, in particular pyridylmethyl and             thiazolylmethyl, each of which can optionally be substituted             by radicals from the series consisting of halogen, in             particular fluorine, chlorine, bromine or iodine,             C₁₋₄-alkyl, in particular methyl, hydoxy-C₁₋₄-alkyl, in             particular hydroxymethyl, amino-C₁₋₄-alkyl, in particular             aminomethyl, aminoethyl, C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in             particular methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminomethyl, dimethylaminoethyl, amino, hydroxyl,             C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylcarbonyl, in             particular methylcarbonyl, C₁₋₄-alkoxycarbonyl, in             particular methoxycarbonyl, or         -   R⁸ and R⁹ together with the adjacent N atom represent a             carbocyclic 5-, 6- or 7-membered ring system, which can             optionally also be interrupted by oxygen, sulphur,             sulphoxyl, carbonyl, —N═, —NR¹¹— or by quaternized nitrogen             and is optionally substituted by C₁₋₄-alkyl, in particular             methyl, hydoxy-C₁₋₄-alkyl, in particular hydroxymethyl,             amino-C₁₋₄-alkyl, in particular aminomethyl, aminoethyl,             C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular             methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminomethyl, dimethylaminoethyl, amino, hydroxyl,             C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylcarbonyl, in             particular methylcarbonyl, C₁₋₄-alkoxycarbonyl, in             particular methoxycarbonyl, halogen, in particular fluorine,             chlorine, bromine or iodine,         -   R¹⁰ represents hydrogen or C₁₋₄-alkyl, in particular methyl,             and         -   R¹¹ represents hydrogen, straight-chain or branched             C₁₋₆-alkyl, in particular methyl, ethyl, C₂₋₆-alkenyl, in             particular vinyl, C₃₋₆-cycloalkyl, in particular             cyclopropyl, C₁₋₄-alkylcarbonyl, in particular             methylcarbonyl, C₃₋₆-cycloalkylcarbonyl, in particular             cyclopropylcarbonyl, C₁₋₄-alkoxycarbonyl, in particular             methoxycarbonyl, ethoxycarbonyl, tert-butoxycarbonyl,             hydroxy-C₁₋₄-alkyl, in particular hydroxyethyl,             hydroxysulphonylethyl, C₁₋₄-alkylamino, in particular             ethylamino, C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular             methylaminoethyl, C₁₋₄-dialkylamino-C₁₋₄-alkyl, in             particular dimethylaminoethyl,             C₃₋₇-cycloalkylamino-C₁₋₄-alkyl, in particular             N-morpholinoethyl, N-piperidinoethyl,             C₃₋₆-cycloalkylaminocarbonyl-C₁₋₂-alkyl, in particular             N-morpholinocarbonylmethyl, cyano, aryl, in particular             phenyl, aryl-C₁₋₂-alkyl, in particular phenylmethyl,             hetaryl, in particular pyridyl or thiazolyl,             hetaryl-C₁₋₂-alkyl, in particular pyridylmethyl and             thiazolylmethyl, each of which can optionally be substituted             by radicals from the series consisting of halogen, in             particular fluorine, chlorine, bromine or iodine,             C₁₋₄-alkyl, methyl, C₁₋₄-halogenoalkyl, in particular             trifluoromethyl, trichloromethyl, amino, hydroxyl,             C₁₋₄-alkoxy, in particular methoxy, C₁₋₂-alkylenedioxy, in             particular methylenedioxy or ethylenedioxy,             C₁₋₄-halogenoalkoxy, in particular trifluoromethoxy,             difluoromethoxy, C₁₋₄-alkylthio, in particular methylthio,             C₁₋₄-halogenoalkylthio, in particular trifluoromethylthio,             C₁₋₄-alkylsulphonyl in particular methylsulphonyl,             C₁₋₄-alkylamino, in particular methylamino,             di-C₁₋₄-alkylamino, in particular dimethylamino,             C₁₋₄-alkylcarbonyl, in particular methylcarbonyl,             C₁₋₄-alkoxycarbonyl, in particular methoxycarbonyl,     -   B represents straight-chain or branched C₁₋₆-alkoxy, in         particular methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy,         isobutoxy, sec-butoxy and tert-butoxy, C₂₋₆-alkenyloxy,         vinyloxy, 2-propenyloxy, 1,1-dimethyl-2-propenyloxy,         1,2-dimethyl-2-propenyloxy, 1-ethyl-2-propenyloxy,         C₂₋₆-alkinyloxy, in particular 2-propinyloxy,         1-methyl-2-propinyloxy, 1,1-dimethyl-2-propinyloxy,         C₃₋₈-cycloalkyloxy, in particular cyclopropyloxy, cyclohexyloxy,         C₃₋₇-cycloalkyl-C₁₋₂-alkyloxy, in particular cyclopropylmethoxy,         cyclohexylmethoxy, aryloxy-, in particular phenoxy,         aryl-C₁₋₂-alkyloxy, in particular benzyloxy, hetaryloxy, in         particular pyridyloxy, hetaryl-C₁₋₂-alkyloxy, in particular         pyridylmethyl and thiazolylmethyl, each of which can be         optionally substituted by radicals from the series consisting of         halogen, in particular fluorine, chlorine, bromine or iodine,         hydroxyl, C₁₋₄-alkyl, in particular methyl, C₁₋₄-halogenoalkyl,         in particular trifluoromethyl, Trichloromethyl, amino, hydroxyl,         C₁₋₄-alkoxy, in particular methoxy, C₁₋₂-alkylenedioxy, in         particular methylenedioxy or ethylenedioxy, C₁₋₄-alkylamino, in         particular methylamino, C₁₋₄-dialkylamino, in particular         dimethylamino, C₃₋₆-cycloalkylamino, in particular pyrrolidino,         piperidino, C₃₋₆-cycloalkylthioamino, in particular         thiomorpholino and dioxothiomorpholino, C₃₋₆-cycloalkyldiamino,         in particular N-methylpiperazino, or represents the amino         radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and —NR¹⁵—OR¹⁶,     -    in which         -   R¹² and R¹³ independently of one another represent hydrogen,             straight-chain or branched C₁₋₆-alkyl, in particular methyl,             ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl,             tert-butyl, 1-methylbutyl, 2,2-dimethylpropyl,             C₁₋₆-alkylcarbonyl, in particular methylcarbonyl,             sec-butylcarbonyl, C₁₋₆-alkylsulphonyl, in particular             methylsulphonyl, ethylsulphonyl, C₂₋₆-alkenyl, in particular             vinyl, 2-propenyl, 1,2-dimethyl-2-propenyl,             2,3-dimethyl-2-butenyl, 1-ethyl-2-butenyl, C₂₋₆-alkinyl, in             particular 2-propinyl, 2-butinyl, C₃₋₈-cycloalkyl, in             particular cyclopropyl, cyclohexyl,             C₃₋₈-cycloalkyl-C₁₋₂-alkyl, in particular cyclopropylmethyl,             cyclobutylmethyl, hydoxy-C₁₋₄-alkyl, in particular             hydroxymethyl, hydroxyethyl, hydroxyethylsulphonylethyl,             C₁₋₄-alkylamino, in particular methylamino, ethylamino,             C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular             methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminomethyl, dimethylaminoethyl,             dimethylaminopropyl, C₃₋₇-cycloalkylamino-C₁₋₄-alkyl, in             particular N-pyrrolidinoethyl, N-morpholinoethyl,             N-piperidinoethyl, N-thiomorpholino-ethyl,             N¹-(N⁴-methyl-piperazino)-ethyl,             C₃₋₆-cycloalkylaminocarbonyl-C₁₋₂-alkyl, in particular             N-morpholinocarbonylmethyl, aryl, in particular phenyl,             aryl-C₁₋₂-alkyl, in particular benzyl, hetaryl-C₁₋₆-alkyl,             in particular pyridylmethyl, thiazolylmethyl, each of which             is optionally substituted by radicals from the series             consisting of halogen, in particular fluorine, chlorine,             bromine or iodine, hydroxyl, C₁₋₄-alkyl, in particular             methyl or tert-butyl, C₁₋₄-alkoxy, in particular methoxy,             ethoxy or tert-butyloxy, nitro, amino, C₁₋₄-alkylamino, in             particular methylamino, C₁₋₄-dialkylamino, in particular             dimethylamino, or         -   R¹² and R¹³ together with the adjacent N atom represent a             carbocyclic 5-, 6-, 7- or 8-membered ring system which can             optionally also be interrupted by oxygen, sulphur,             sulphonyl, carbonyl, —N═, —NR¹¹— or by quaternized nitrogen             and is optionally substituted by C₁₋₄-alkyl, in particular             methyl, hydoxy-C₁₋₄-alkyl, in particular hydroxymethyl,             amino-C₁₋₄-alkyl, in particular aminomethyl, aminoethyl,             C₁₋₄-monoalkylamino-C₁₋₄-alkyl, in particular             methylaminomethyl, methylaminoethyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminoethyl, C₃₋₆-cycloalkylamino, in particular             pyrrolidino, piperidino or morpholino, amino, hydroxyl,             C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylcarbonyl, in             particular methylcarbonyl, C₁₋₄-alkoxycarbonyl, in             particular methoxycarbonyl, or         -    a radical from the groups G⁴, G⁵, G⁶, G⁷ and G⁸

-   -   -    in which         -   n can denote the numbers 0, 1, 2, or 3,         -   R¹⁴ represents hydrogen, straight-chain or branched             C₁₋₆-alkyl, in particular methyl, ethyl, sec-butyl,             C₃₋₆-cycloalkyl, in particular cyclopropyl,         -   R¹⁵ and R¹⁶ independently of one another represent hydrogen,             straight-chain or branched C₁₋₆-alkyl, in particular methyl,             ethyl, sec-butyl, C₁₋₆-alkylcarbonyl, in particular             methylcarbonyl, sec-butylcarbonyl, C₂₋₆-alkenyl, in             particular 2-propenyl, 1-methyl-2-propenyl,             1,1-dimethyl-2-propenyl, C₂₋₆-alkinyl, in particular             2-propinyl, C₃₋₆-cycloalkyl, in particular cyclopropyl,         -   R¹⁵ and R¹⁶ together with the adjacent N—O-group represent a             carbocyclic 5-, 6- or 7-membered ring,             with the proviso in the case where

    -   R¹ represents hydrogen and methyl, and

    -   R⁵ represents hydrogen and

-   -    represents carboxyl,     -   Q represents radicals other than methyl,     -   B represents radicals other than —NH₂, and     -   with the further proviso in the case where

-   -    represents carboxyl, and     -   G² represents tert-butyloxy, benzyloxy and 4-nitro-benzyloxy,     -   B represents radicals other than tert-butyloxy, benzyloxy and         4-nitro-benzyloxy,     -   and its optical isomers and racemates.

Very particularly preferred compounds are those of the formula (Ia) and their salts

in which

-   -   R¹ represents straight-chain or branched C₁₋₄-alkyl, in         particular methyl,     -   R² represents straight-chain or branched C₁₋₄-alkyl, in         particular methyl or ethyl,     -   R³ and R⁴ represent hydrogen,     -   R⁵ represents hydrogen, straight-chain or branched C₁₋₄-alkyl,         in particular methyl or ethyl,

-   -    represents carboxyl or sulfonyl,     -   Q represents a radical from the group G² and G³

-   -    in which

-   -   can denote carboxyl or sulphonyl,     -   Y represents oxygen or —NR⁹,         -   R⁸ in the case where Y represents nitrogen, denotes a cyclic             amino group linked via a nitrogen atom, in particular             pyrrolidino, 2-pyrrolin-1-yl, 1-pyrrolyl, piperidino,             1-piperazinyl, morpholino, thiomorpholino,             dioxothiomorpholino,         -   R⁸ and R⁹ independently of one another represent             straight-chain or branched C₁₋₄-alkyl, in particular methyl,             ethyl, propyl, isopropyl, sec-butyl, C₂₋₄-alkenyl, in             particular vinyl, 2-propenyl, 1-methyl-2-propenyl and             C₂₋₄-alkinyl, in particular ethinyl, 2-propinyl,             C₃₋₆-cycloalkyl, in particular cyclopropyl,             hetaryl-C₁₋₂-alkyl, in particular 2-chloro-pyrid-5-yl-methyl             and chloro-thiazol-5-yl-methyl, or     -   R⁸ and R⁹ together with the adjacent N atom represent a         carbocyclic 5-, 6- or 7-membered ring system which can         optionally also be interrupted by oxygen, sulphur, sulphonyl,         carbonyl, —N═, —NR¹¹— or by quaternized nitrogen and is         optionally substituted by C₁₋₄-alkyl, in particular methyl,         C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular dimethylaminoethyl,         hydroxyl, C₁₋₄-alkoxycarbonyl, but particularly preferably         methoxycarbonyl, in particular pyrrolidino, 3-oxopyrrolidino,         morpholino, 2,6-dimethylmorpholino, thiomorpholino,         dioxothiomorpholino,     -   R¹⁰ represents hydrogen or C₁₋₄-alkyl, in particular methyl,     -   R¹¹ stands straight-chain or branched C₁₋₆-alkyl, in particular         methyl, C₂₋₆-alkenyl, in particular vinyl, C₃₋₆-cycloalkyl, in         particular cyclopropyl, C₁₋₄-alkylcarbonyl, in particular         methylcarbonyl, C₃₋₆-cycloalkylcarbonyl, in particular         cyclopropylcarbonyl, cyclohexylcarbonyl, C₁₋₄-alkoxycarbonyl, in         particular methoxycarbonyl, hydroxy-C₁₋₄-alkyl, in particular         hydroxyethyl, hydroxysulphonylethyl, C₁₋₄-alkylamino, in         particular ethylamino, C₁₋₄-dialkylamino-C₁₋₄-alkyl, in         particular dimethylaminoethyl, C₃₋₇-cycloalkylamino-C₁₋₄-alkyl,         in particular N-morpholinoethyl, N-piperidinoethyl,         C₃₋₆-cycloalkylaminocarbonyl-C₁₋₂-alkyl, in particular         N-morpholinocarbonylmethyl,     -   B represents straight-chain or branched C₁₋₆-alkoxy, in         particular methoxy, ethoxy, n-propoxy, sec-butoxy and         tert-butoxy, C₂₋₆-alkenyloxy, 2-propenyloxy,         1,1-dimethyl-2-propenyloxy, C₂₋₆-alkinyloxy, in particular         2-propinyloxy, 1-methyl-2-propinyloxy, C₃₋₈-cycloalkyloxy, in         particular cyclopropyloxy, aryl-C₁₋₂-alkyloxy, in particular         benzyloxy, hetaryloxy, in particular pyridyloxy,         hetaryl-C₁₋₂-alkyloxy, in particular pyridylmethyloxy and         thiazolylmethyloxy, each of which can optionally be substituted         by radicals from the series consisting of halogen, in particular         fluorine, chlorine, bromine or iodine, amino, hydroxyl,         C₁₋₄-alkoxy, in particular methoxy, C₁₋₄-alkylamino, in         particular methylamino, C₁₋₄-dialkylamino, in particular         dimethylamino, C₃₋₆-cycloalkylamino, in particular piperidino,         C₃₋₆-cycloalkylthioamino, in particular dioxothiomorpholino,         C₃₋₆-cycloalkyldiamino, in particular N-methyl-piperazino, or         represents the amino radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and         —NR¹⁵—OR¹⁶,     -    in which         -   R¹² and R¹³ independently of one another represent hydrogen,             straight-chain or branched C₁₋₆-alkyl, in particular methyl,             ethyl, C₁₋₆-alkylcarbonyl, in particular methylcarbonyl,             C₁₋₆-alkylsulphonyl, in particular methylsulphonyl,             C₂₋₆-alkenyl, in particular 2-propenyl, 1-methyl-2-propenyl,             C₂₋₆-alkinyl, in particular 2-propinyl, C₃₋₈-cycloalkyl, in             particular cyclopropyl, cyclohexyl,             C₃₋₈-cycloalkyl-C₁₋₂-alkyl, in particular cyclopropylmethyl,             hydoxy-C₁₋₄-alkyl, in particular hydroxymethyl,             hydroxyethylsulphonylethyl, C₁₋₄-dialkylamino-C₁₋₄-alkyl, in             particular dimethylaminoethyl,             C₃₋₇-cycloalkylamino-C₁₋₄-alkyl, in particular             N-morpholinoethyl, N¹-(N⁴-methyl-piperazino)-ethyl,             C₃₋₆-cycloalkylaminocarbonyl-C₁₋₂-alkyl, in particular             N-morpholinocarbonylmethyl, or         -   R¹² and R¹³ together with the adjacent N atom represent a             carbocyclic 5-, 6-, 7- or 8-membered ring system which can             optionally also be interrupted by oxygen, sulphur, carbonyl,             —N═, —NR¹¹— by quaternized nitrogen and is optionally             substituted by C₁₋₄-alkyl, in particular methyl,             C₁₋₄-dialkylamino-C₁₋₄-alkyl, in particular             dimethylaminoethyl, C₃₋₆-cycloalkylamino, in particular             piperidino, hydroxyl, C₁₋₄-alkoxy, in particular methoxy,             C₁₋₄-alkylcarbonyl in particular methylcarbonyl,             C₁₋₄-alkoxycarbonyl, in particular methoxycarbonyl, or         -    a radical from the groups G⁴, G⁵, G⁶, G⁷ and G⁸

-   -   -    in which         -   n can denote the numbers 0, 1 or 2,         -   R¹⁴ represents hydrogen, straight-chain or branched             C₁₋₆-alkyl, in particular methyl,         -   R¹⁵ and R¹⁶ independently of one another represents             hydrogen, straight-chain or branched C₁₋₆-alkyl, in             particular methyl, C₁₋₆-alkylcarbonyl, in particular             methylcarbonyl, sec-butylcarbonyl, C₂₋₆-alkenyl, in             particular 2-propenyl, C₂₋₆-alkinyl, in particular             2-propinyl, C₃₋₆-cycloalkyl, in particular cyclopropyl,             with the proviso in the case where

    -   R¹ represents hydrogen and methyl, and

    -   R⁵ represents hydrogen and

-   -    represents carboxyl,     -   Q represents radicals other than methyl,     -   B represents radicals other than —NH₂, and     -   with the further proviso in the case where

-   -    represents carboxyl, and     -   G² represents tert-butyloxy, benzyloxy and 4-nitro-benzyloxy,     -   B represents radicals other than tert-butyloxy, benzyloxy and         4-nitro-benzyloxy,     -   and its optical isomers and racemates.

The compound of the general formula (I) to be used according to the invention and their salts additionally contain one or more centres of chirality and can thus be present in pure stereoisomers or in the form of various enantiomer and diastereomer mixtures which, if necessary, can be separated in a manner known per se. The invention therefore relates both to the pure enantiomers and diastereomers, and to their mixtures for the control of endoparasites, particularly in the field of medicine and veterinary medicine.

Preferably, however, the optically active, stereoisomeric forms of the compounds of the general formula (I) and their salts are used according to the invention.

Suitable salts of the compounds of the general formula (I) which can be mentioned are customary non-toxic salts, i.e. salts with various bases and salts with added acids. Preferably, salts with inorganic, bases such as alkali metal salts, for example sodium, potassium or caesium salts, alkaline earth metal salts, for example calcium or magnesium salts, ammonium salts, salts with organic bases and also with organic amines, for example triethylammonium, pyridinium, picolinium, ethanolammonium, triethanolammonium, dicyclohexylammonium or N,N′-dibenzylethylenediammonium salts, salts with inorganic acids, for example hydrochlorides, hydrobromides, dihydrosulphates or trihydrophosphates, salts with organic carboxylic acids or organic sulpho acids, for example formates, acetates, trifluoroacetates, maleates, tartrates, methanesulphonates, benzenesulphonates or para-toluenesulphonates, salts with basic amino acids or acidic amino acids, for example arginates, aspartates or glutamates, may be mentioned.

In particular, the groups of compounds mentioned in the following Tables 1 to 84 may be mentioned.

Very particularly preferred compounds are those of the formula (Ia-1) and their salts, consisting of the N-methyl-amino acid N-methyl-alanine (R¹, R²=methyl and R³=hydrogen) and the 2-hydroxycarboxylic acid 2-hydroxyacetic acid (R⁴, R⁵=hydrogen) which are indicated in the following Tables 1 to 13.

TABLE 1 (Ia-1)

Compounds of the Table 1 correspond to the general formula (Ia-1) in which

represents carboxyl; Q = —NMe₂, B = as listed in the following: Compound No. B 1 —O-Me 2 —O—CH₂-Me 3 —O—(CH₂)₂-Me 4 —O—CHMe₂ 5 —O—CMe₃ 6 —O—CHMe-CH₂-Me 7 —O—CH₂—CH═CH₂ 8 —O—CHMe-CH═CH₂ 9 —O—CMe₂-CH═CH₂ 10 —O—CH₂—C≡CH 11 —O—CHMe-C≡CH 12 —NMe₂ 13 —NMe-(CH₂)₂-Me 14 —NH-Me 15 —O-Cyclopropyl 16

17

18

19 —NMe-(CH₂)₃-Me 20 —NMe-CHMe-CH₂-Me 21 —NMe-(CH₂)₂—NMe₂ 22 —NMe-(CH₂)₃—NMe₂ 23 —NMe-CH₂—CH═CH₂ 24 —NMe-CH₂—C≡CH 25 —N(CH₂—CH₂—OH)₂ 26 —N[(CH₂)₂—SO₂—(CH₂)₂—OH]₂ 27 —NMe(CH₂)₂—SO₂—(CH₂)₂—OH 28 —NMe-CO—CH₂—O—CH₂—COOH 29 —NMe-O-Me 30 —N(CH₂-Me)₂ 31 —NMe-CH₂-Me 32 —NEt-(CH₂)₂-Me 33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

 47a

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

Abbreviations: Me: methyl; Et: ethyl, Pr: propyl; Bu: butyl; i-, s- and t-: iso-, secondary- and tertiary

TABLE 2 Table 2 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 3 Table 3 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —O-Me and B has the meanings listed in Table 1.

TABLE 4 Table 4 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —O—CHMe-CH₂-Me and B has the meanings listed in Table 1.

TABLE 5 Table 5 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —O—CH₂—CH═CH₂ and B has the meanings listed in Table 1.

TABLE 6 Table 6 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —O—CHMe-CH═CH₂ and B has the meanings listed in Table 1.

TABLE 7 Table 7 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —O—CH₂—C≡CH and B has the meanings listed in Table 1.

TABLE 8 Table 8 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —O—CMe═CH₂ and B has the meanings listed in Table 1.

TABLE 9 Table 9 contains the compounds of the general formula (Ia-I) in which

represents carboxyl; Q represents —NMe—CO—NMe₂ and B has the meanings listed in Table 1.

TABLE 10 Table 10 contains the compounds of the general formula (Ia-1) in which

represents carboxyl; Q represents —NMe-CO—NEt₂ and B has the meanings listed in Table 1.

TABLE 11

TABLE 12

TABLE 13

TABLE 14

Furthermore preferred are the compounds of the formula (Ia-2) and their salts, consisting of the N-methyl-amino acid N-methyl-alanine (R¹, R²=methyl and R³=hydrogen) and the 2-hydroxycarboxylic acid 2-hydroxy-propionic acid (lactic acid) R⁴=hydrogen; R⁵=methyl).

Very particularly preferred examples of these new compounds (Ia-2) according to the invention are mentioned in Tables 15-28.

TABLE 15 (Ia-2)

TABLE 16

TABLE 17

TABLE 18

TABLE 19

TABLE 20

TABLE 21 Table 21 contains the compounds of the general formula (Ia-2) in which

represents carboxyl; Q represents —O—CH₂—C≡CH and B has the meanings listed in Table 1.

TABLE 22 Table 22 contains the compounds of the general formula (Ia-2) in which

represents carboxyl; Q represents —O—CMe═CH₂ and B has the meanings listed in Table 1.

TABLE 23 Table 23 contains the compounds of the general formula (Ia-2) in which

represents carboxyl; Q represents —NMe-CO—NMe₂ and B has the meanings listed in Table 1.

TABLE 24 Table 24 contains the compounds of the general formula (Ia-2) in which

represents carboxyl; Q represents —NMe-CO—NEt₂ and B has the meanings listed in Table 1.

TABLE 25 Table 25 contains the compounds of the general formula (Ia-2) in which

represents carboxyl; Q represents

and B has the meanings listed in Table 1.

TABLE 26 Table 26 contains the compounds of the general formula (Ia-2) in which

represents sulphonyl; Q represents —NMe₂ and B has the meanings listed in Table 1.

TABLE 27 Table 27 contains the compounds of the general formula (Ia-2) in which

represents sulphonyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 28 Table 28 contains the compounds of the general formula (Ia-2) in which

represents sulphonyl; Q represents

and B has the meanings listed in Table 1.

Furthermore preferred are the compounds of the formula (Ia-3) and their salts, consisting of the N-methyl-amino acid N-methyl-alanine (R¹, R²=methyl and R³=hydrogen) and the 2-hydroxycarboxylic acid 2-hydroxy-butyric acid (R⁴=hydrogen; R⁵=ethyl).

Very particularly preferred examples of these new compounds (Ia-3) according to the invention are mentioned in Tables 29-42.

TABLE 29 (Ia-3)

Compounds of Table 29 correspond to the general formula (Ia-3) in which

represents carboxyl; Q represents —NMe₂ and B has the meanings listed in Table 1.

TABLE 30 Table 30 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 31 Table 31 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —O-Me and B has the meanings listed in Table 1.

TABLE 32 Table 32 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —O—CHMe-CH₂-Me and B has the meanings listed in Table 1.

TABLE 33 Table 33 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —O—CH₂—CH═CH₂ and B has the meanings listed in Table 1.

TABLE 34 Table 34 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —O—CHMe-CH═CH₂ and B has the meanings listed in Table 1.

TABLE 35 Table 35 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —O—CH₂C≡CH and B has the meanings listed in Table 1.

TABLE 36 Table 36 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —O—CMe═CH₂ and B has the meanings listed in Table 1.

TABLE 37 Table 37 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —NMe-CO—NMe₂ and B has the meanings listed in Table 1.

TABLE 38 Table 38 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents —NMe-CO—NEt₂ and B has the meanings listed in Table 1.

TABLE 39 Table 39 contains the compounds of the general formula (Ia-3) in which

represents carboxyl; Q represents

and B has the meanings listed in Table 1.

TABLE 40 Table 40 contains the compounds of the general formula (Ia-3) in which

represents sulphonyl; Q represents —NMe₂ and B has the meanings listed in Table 1.

TABLE 41 Table 41 contains the compounds of the general formula (Ia-3) in which

represents sulphonyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 42 Table 42 contains the compounds of the general formula (Ia-3) in which

represents sulphonyl; Q represents

and B has the meanings listed in Table 1.

Furthermore preferred are the compounds of the formula (Ia-4) and their salts, consisting of the N-methyl-amino acid N-methyl-aminobutyric acid (R¹=methyl, R²=ethyl and R³=hydrogen) and the 2-hydroxycarboxylic acid 2-hydroxyacetic acid (R⁴, R⁵=hydrogen).

Very particularly preferred examples of these new compounds (Ia-4) according to the invention are mentioned in Tables 43-56.

TABLE 43 (Ia-4)

Compounds of Table 43 correspond to the general formula (Ia-4) in which

represents carboxyl; Q represents —NMe₂ and B has the meanings listed in Table 1.

TABLE 44 Table 44 contains the compounds of the general formula (Ia-4) in which

represents carboxyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 45 Table 45 contains the compounds of the general formula (Ia-4) in which

represents carboxyl; Q represents —O-Me and B has the meanings listed in Table 1.

TABLE 46 Table 46 contains the compounds of the general formula (Ia-4) in which

represents carboxyl; Q represents —O—CHMe-CH₂-Me and B has the meanings listed in Table 1.

TABLE 47 Table 47 contains the compounds of the general formula (Ia-4) in which

represents carboxyl; Q represents —O—CH₂—CH═CH₂ and B has the meanings listed in Table 1.

TABLE 48 Table 48 contains the compounds of the general formula (Ia-4) in which

represents carboxyl; Q represents —O—CHMe-CH═CH₂ and B has the meanings listed in Table 1.

TABLE 49 Table 49 contains the compounds of the general formula (Ia-4) in which

represents carboxyl; Q represents —O—CH₂—C≡CH and B has the meanings listed in Table 1.

TABLE 50 Table 50 contains the compounds of the general formula (Ia-4) in which

represents carboxyl; Q represents —O—CMe═CH₂ and B has the meanings listed in Table 1.

TABLE 51

TABLE 52

TABLE 53

TABLE 54

TABLE 55

TABLE 56

Furthermore preferred are the compounds of the formula (Ia-5) and their salts, consisting of the N-methyl-amino acid N-methyl-aminobutyric acid (R¹=methyl, R²=ethyl and R³=hydrogen) and the 2-hydroxycarboxylic acid 2-hydroxypropionic acid (lactic acid) (R⁴=hydrogen; R⁵=methyl).

Very particularly preferred examples of these new compounds (Ia-5) according to the invention are mentioned in Tables 57-70.

TABLE 57 (Ia-5)

TABLE 58

TABLE 59

TABLE 60

TABLE 61 Table 61 contains the compounds of the general formula (Ia-5) in which

represents carboxyl; Q represents —O—CH₂—CH═CH₂ and B has the meanings listed in Table 1.

TABLE 62 Table 62 contains the compounds of the general formula (Ia-5) in which

represents carboxyl; Q represents —O—CHMe-CH═CH₂ and B has the meanings listed in Table 1.

TABLE 63 Table 63 contains the compounds of the general formula (Ia-5) in which

represents carboxyl; Q represents —O—CH₂—C≡CH and B has the meanings listed in Table 1.

TABLE 64 Table 64 contains the compounds of the general formula (Ia-5) in which

represents carboxyl; Q represents —O—CMe═CH₂ and B has the meanings listed in Table 1.

TABLE 65 Table 65 contains the compounds of the general formula (Ia-5) in which

represents carboxyl; Q represents —NMe-CO—NMe₂ and B has the meanings listed in Table 1.

TABLE 66 Table 66 contains the compounds of the general formula (Ia-5) in which

represents carboxyl; Q represents —NMe-CO—NEt₂ and B has the meanings listed in Table 1.

TABLE 67 Table 67 contains the compounds of the general formula (Ia-5) in which

represents carboxyl; Q represents

and B has the meanings listed in Table 1.

TABLE 68 Table 68 contains the compounds of the general formula (Ia-5) in which

represents sulphonyl; Q represents —NMe₂ and B has the meanings listed in Table 1.

TABLE 69 Table 69 contains the compounds of the general formula (Ia-5) in which

represents sulphonyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 70 Table 70 contains the compounds of the general formula (Ia-5) in which

represents sulphonyl; Q represents

and B [lacuna] the [lacuna] in Table 1 listed.

Furthermore preferred are the compounds of the formula (Ia-6) and their salts, consisting of the N-methyl-amino acid N-methyl-aminobutyric acid (R¹=methyl, R²=ethyl and R³=hydrogen) and the 2-hydroxycarboxylic acid 2-hydroxybutyric acid (R⁴=hydrogen; R⁵=ethyl).

Very particularly preferred examples of these new compounds (Ia-6) according to the invention are mentioned in Tables 71-84.

TABLE 71 (Ia-6)

Compounds of Table 71 correspond to the general formula (Ia-6) in which

represents carboxyl; Q represents —NMe₂ and B has the meanings listed in Table 1.

TABLE 72 Table 72 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 73 Table 73 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —O-Me and B has the meanings listed in Table 1.

TABLE 74 Table 74 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —O—CHMe-CH₂-Me and B has the meanings listed in Table 1.

TABLE 75 Table 75 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —O—CH₂—CH═CH₂ and B has the meanings listed in Table 1.

TABLE 76 Table 76 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —O—CHMe-CH═CH₂ and B has the meanings listed in Table 1.

TABLE 77 Table 77 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —O—CH₂—C≡CH and B has the meanings listed in Table 1.

TABLE 78 Table 78 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —O—CMe═CH₂ and B has the meanings listed in Table 1.

TABLE 79 Table 79 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —NMe-CO—NMe₂ and B has the meanings listed in Table 1.

TABLE 80 Table 80 contains the compounds of the general formula (Ia-6) in which

represents carboxyl; Q represents —NMe—CO-NEt₂ and B has the meanings listed in Table 1.

TABLE 81 Table 81 contains the compounds of the general formula (Ia-6) in which

represents carboxyl, Q represents

and B has the meanings listed in Table 1.

TABLE 82 Table 82 contains the compounds of the general formula (Ia-6) in which

represents sulphonyl; Q represents —NMe₂ and B has the meanings listed in Table 1.

TABLE 83 Table 83 contains the compounds of the general formula (Ia-6) in which

represents sulphonyl; Q represents —NEt₂ and B has the meanings listed in Table 1.

TABLE 84 Table 84 contains the compounds of the general formula (Ia-6) in which

represents sulphonyl; Q represents

and B has the meanings listed in Table 1.

In detail, the following compounds of the general formula (Ia) may be mentioned in which the radicals R¹ to R⁵, G, Q, X and B have the following meaning:

Q G═X R¹ R² R³ R⁴ R⁵ B Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Et₂N— SO₂ -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Me₂N— SO₂ -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Et₂N— SO₂ -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Me₂N— SO₂ -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

Me₂N—CO—NMe C═O -Me -Me —H —H -Me —O-Et Me-CH₂—MeCH—O— C═O -Me -Me —H —H -Me —O-Et H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —O-Et H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —O-Et H₂C═CMe-O— C═O -Me -Me —H —H -Me —O-Et HC≡C—CH₂—O— C═O -Me _me —H —H -Me —O-Et Me₂N— C═O -Me -Me —H —H -Me —O-Et Et₂N— C═O -Me -Me —H —H -Me —O-Et

SO₂ -Me -Me —H —H -Me —O-Et

SO₂ -Me -Me —H —H -Me —O-Et

-Me -Me —H —H -Me —O-Et

-Me -Me —H —H -Me —O-Et

-Me -Me —H —H -Me —O-Et

C═O -Me -Me —H —H -Me —O-Et

C═O -Me -Me —H —H -Me —O-Et Me₂N—CO—NMe C═O -Me -Me —H —H -Me —NMe₂ Me-CH₂MeCH—O— C═O -Me -Me —H —H -Me —NMe₂ H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —NMe₂ H₂NC═CH—CHMe-O— C═O -Me -Me —H —H -Me —NMe₂ H₂C═CMe-O— C═O -Me -Me —H —H -Me —NMe₂ HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NMe₂ Me₂N— C═O -Me -Me —H —H -Me —NMe₂ Et₂N— C═O -Me -Me —H —H -Me —NMe₂

SO₂ -Me -Me —H —H -Me —NMe₂

SO₂ -Me -Me —H —H -Me —NMe₂

-Me -Me —H —H -Me —NMe₂

-Me -Me —H —H -Me —NMe₂

-Me -Me —H —H -Me —NMe₂

C═O -Me -Me —H —H -Me —NMe₂

C═O -Me -Me —H —H -Me —NMe₂ Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —NEt₂ Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me —NEt₂ H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —NEt₂ H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —NEt₂ H₂C═CMe-O— C═O -Me -Me —H —H -Me —NEt₂ HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NEt₂ Me₂N C═O -Me -Me —H —H -Me —NEt₂ Et₂N— C═O -Me -Me —H —H -Me —NEt₂

-Me -Me —H —H -Me —NEt₂

C═O -Me -Me —H —H -Me —NEt₂ Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂—MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂ Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂ H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂ H₂C═CMe-O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂ HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂ Me₂N— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂ Et₂N— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂

-Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂

C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—NMe₂ H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —NMe-CHMe-CH₂-Me H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —NMe-CHMe-CH₂-Me H₂C═CMe-O— C═O -Me -Me —H —H -Me —NMe-CHMe-CH₂-Me HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NMe-CHMe-CH₂-Me Me₂N— C═O -Me -Me —H —H -Me —NMe-CHMe-CH₂-Me Et₂N— C═O -Me -Me —H —H -Me —NMe-CHMe-CH₂-Me

-Me -Me —H —H -Me —NMe-CHMe-CH₂-Me

C═O -Me -Me —H —H -Me —NMe-CHMe-CH₂-Me H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —NMe-O-Me H₂C═CMe-O— C═O -Me -Me —H —H -Me —NMe-O-Me HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NMe-O-Me Me₂N— C═O -Me -Me —H —H -Me —NMe-O-Me Et₂N— C═O -Me -Me —H —H -Me —NMe-O-Me

-Me -Me —H —H -Me —NMe-O-Me

C═O -Me -Me —H —H -Me —NMe-O-Me H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —O—Pr H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —O—Pr H₂C═CMe-O— C═O -Me -Me —H —H -Me —O—Pr HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —O—Pr Me₂N— C═O -Me -Me —H —H -Me —O—Pr Et₂N— C═O -Me -Me —H —H -Me —O—Pr Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —NMe-nPr Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me —NMe-nPr H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —NMe-nPr H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —NMe-nPr H₂C═CMe-O— C═O -Me -Me —H —H -Me —NMe-nPr HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NMe-nPr Me₂N— C═O -Me -Me —H —H -Me —NMe-nPr Et₂N— C═O -Me -Me —H —H -Me —NMe-nPr

-Me -Me —H —H -Me —NMe-nPr

C═O -Me -Me —H —H -Me —NMe-nPr Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH H₂C═CMe-O— C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH Me₂N— C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH Et₂N— C═O -Me -Me —H —H -Me —NMe—CH₂C≡CH

-Me -Me —H —H -Me —NMe—CH₂C≡CH

C═O -Me -Me —H —H -Me —NEt-nPr Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH H₂C═CMe-O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH Me₂N— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH Et₂N— C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH

-Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH

C═O -Me -Me —H —H -Me —NMe-(CH₂)₂—SO₂— (CH₂)₂—OH Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ H₂C═CMe-O— C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ Me₂N— C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ Et₂N— C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂

-Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂

C═O -Me -Me —H —H -Me —N(CH₂—CH₂—OH)₂ Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂—— (CH₂)₂—OH]₂ Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂— (CH₂)₂—OH]₂ H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂— (CH₂)₂—OH]₂ H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂— (CH₂)₂—OH]₂ H₂C═CMe-O— C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂— (CH₂)₂—OH]₂ HC≡C—CH₂—O— C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂— (CH₂)₂—OH]₂ Me₂N— C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂— (CH₂)₂—OH]₂ Et₂N— C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂— (CH₂)₂—OH]₂

-Me -Me —H —H -Me —N[(CH₂)₂—SO₂—(CH₂)₂—OH]₂

C═O -Me -Me —H —H -Me —N[(CH₂)₂—SO₂—(CH₂)₂—OH]₂ Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Et₂N— C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CH₂—O— -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

SO₂ -Me -Me —H —H -Me —O-Me Et₂N SO₂ -Me -Me —H —H -Me —O-Me Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

-Me -Me —H —H -Me

Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Me₂N— SO₂ -Me -Me —H —H -Me

Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-MeCH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N— C═O -Me -Me —H —H -Me

Me₂N— SO₂ -Me -Me —H —H -Me

Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

Me-CH₂-Me-CH—O— C═O -Me -Me —H —H -Me

H₂C═CH—CHMe-O— C═O -Me -Me —H —H -Me

H₂C═CMe-O— C═O -Me -Me —H —H -Me

HC≡C—CH₂—O— C═O -Me -Me —H —H -Me

Me₂N C═O -Me -Me —H —H -Me

Me₂N SO₂ -Me -Me —H —H -Me

Abbreviations: Me: -methyl; Et: ethyl; Pr; -propyl; Bu: -butyl; i-, s- and t-: iso-, secondary- and tertiary

If, in process 3a for the preparation of the new didepsipeptides (Ia), as compounds of the general formula (II) N-methyl-N-trimethylallophanoyl-L-alanine and as compounds of the general formula (III) isobutyl D-lactate are employed, the process can be represented by the following reaction scheme:

Formula (II) provides a general definition of the N-terminal-acylated N-alkyl-amino acids needed as starting substances for carrying out process 3a according to the invention. In this formula, R¹, R², R³, G, Q and X preferably represent those radicals which have already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (II) according to the invention.

The N-acylated N-alkyl-amino acids of the general formula (II) used as starting materials are known in some cases (cf. for example: N-methylamino acids: R. Bowmann et al. J. Chem. Soc. (1950) p. 1346, J. R. McDermott et al. Can. J. Chem. 51 (1973) p. 1915; H. Wurziger et al. Kontakte (Merck, Darmstadt) 3 (1987) p. 8) or can be obtained by the processes described there.

Formula (III) provides a general definition of the carboxylic acid derivatives additionally to be used as starting substances for carrying out process 3a according to the invention.

In the formula (III), R⁴, R⁵, B and Z have the meaning which have already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The compounds of the formula (III) are generally known compounds of organic chemistry or can be obtained by methods known from the literature (e.g.: 2-hydroxycarboxylic acid derivatives: cf. Houben-Weyl, Methoden der organischen Chermie, Volume VIII; 2-halogenocarboxylic acid derivatives: S. M. Birnbaum et al. J. Amer. Chem. Soc. 76 (1954) p. 6054, C. S. Rondestvedt, Jr. et al. Org. Reactions 11 (1960) p. 189 [Review]) or can be obtained by the processes described there.

The reaction of the N-acylated N-alkylamino acids (II) with 2-hydroxycarboxylic acid derivatives (III) is preferably carried out using diluents in the presence of coupling reagents and in the presence of a basic reaction auxiliary.

The coupling reagents used for carrying out process 3a are all those which are suitable for the preparation of an amide bond (cf. for example: Houben-Weyl, Methoden der organischen Chemie [Methods of Organic Chemistry], Volume 15/2; Bodanszky et al., Peptide Synthesis 2nd ed. (Wiley & Sons, New York 1976) or Gross, Meienhofer, The Peptides: Analysis Synthesis, Biology (Academic Press, New York 1979). The following methods are preferably used: active ester method using pentachlorophenol (Pcp) and pentafluorophenol (Pfp), N-hydroxysuccinimide, N-hydroxy-5-norbornene-2,3-dicarbox-amide (HONB), 1-hydroxy-benzotriazole (HOBt) or 3-hydroxy-4-oxo-3,4-dihydro1,2,3-benzotriazine as the alcohol component, coupling using carbodiimides such as dicyclohexyl-carbodiimide (DCC) according to the DCC additive process, or using n-propanephos-phonic anhydride (PPA) and mixed anhydride method using pivaloyl chloride, ethyl chloroformate (EEDQ) and isobutyl chloroformate (IIDQ) or coupling using phosphonium reagents, such as benzotriazol-1-yl-oxy-tris(dimethylamino-phosphonium) hexafluorophosphate (BOP), bis(2-oxo-3-oxazolidinyl)phosphonium acid chloride (BOP-Cl), or using phosphonic acid ester reagents, such as diethyl cyanophosphonate (DEPC) and diphenylphosphoryl azide (DPPA) or uronium reagents, such as 2-(1H-benzotrinazol-1-yl)-1,1,3,3-tetramethyluronium tetrafluoro borate (TBTU).

The preferred coupling is using phosphonium reagents such as bis(2-oxo-3-oxazolidinyl)-phosphonium acid chloride (BOP-Cl), benzotriazol-1-yl-oxy-tris(dimethylamino-phosphonium) hexafluorophosphate (BOP) and phosphonic acid ester reagents, such as diethyl cyanophosphonate (DEPC) or diphenylphosphoryl azide (DPPA).

Basic reaction auxiliaries which can be employed for carrying out process 3a according to the invention are all suitable acid-binding agents, such as amines, in particular tertiary amines, and alkali metal and alkaline earth metal compounds.

Examples which may therefore be mentioned are the hydroxides, oxides and carbonates of lithium, sodium, potassium, magnesium, calcium and barium, and further other basic compounds such as amidine bases or guanidine bases such as 7-methyl-1,5,7-triazabi-cyclo(4.4.0)dec-5-ene (MTBD); diazabicyclo(4.3.0)nonene (DBN), diazabicyclo(2.2.2)-octane (DABCO), 1,8-diaza-bicyclo(5.4.0)undecene (DBU) cyclohexyl-tetrabutylguanidine (CyTGB), cyclohexyltetramethylguanidine (CyTMG), N,N,N,N-tetramethyl-1,8-naphthalenediamine, pentamethylpiperidine, tertiary amines such as triethylamine, trimethylamine, tribenzylamine, triisopropylamine, tributylamine, tribenzylamine, tricyclohexylamine, triamylamine, trihexylamine, N,N-dimethyl-aniline, N,N-dimethyl-toluidine, N,N-dimethyl-p-aminopyridine, N-methyl-pyrrolidine, N-methyl-piperidine, N-methyl-imidazole, N-methyl-pyrrole, N-methyl-morpholine, N-methyl-hexamethyleneimine, pyridine, 4-pyrrolidinopyridine, 4-dimethylamino-pyridine, quinoline, α-picoline, α-picoline, isoquinoline, pyrimidine, acridine, N,N,N′,N′-tetramethylenediamine, N,N′,N′-tetraethylenediamine, quinoxaline, N-propyl-diisopropylamine, N-ethyl-diisopropylamine, N,N′-dimethylcyclohexylamine, 2,6-lutidine, 2,4-lutidine or triethylenediamine.

Those preferably used are tertiary amines, in particular trialkylamines such as triethylamine, N,N-diisopropylethylamine, N-propyl-diisopropylamine, N,N′-dimethyl-cyclohexylamine or N-methylmorpholine.

In general, it is advantageous to carry out process 3a according to the invention in the presence of diluents. Diluents are advantageously employed in an amount such that the reaction mixture remains readily stirrable during the whole process. Suitable diluents for carrying out process 3a according to the invention are all inert organic solvents.

Examples which may be mentioned are: halogenohydrocarbons, in particular chlorohydrocarbons, such as tetrachloroethylene, tetrachloroethane, dichloropropane, methylene chloride, dichlorobutane, chloroform, carbon tetrachloride, trichloroethane, trichloroethylene, pentachloroethane, difluorobenzene, 1,2-dichloroethane, chlorobenzene, dichlorobenzene, chlorotoluene, trichlorobenzene; alcohols such as methanol, ethanol, isopropanol, butanol; ethers such as ethyl propyl ether, methyl tert-butyl ether, n-butyl ether, anisole, phenetole, cyclohexyl methyl ether, dimethyl ether, diethyl ether, dipropyl esther, diisopropyl ether, di-n-butyl ether, diisobutyl ether, diisoamyl ether, ethylene glycol dimethyl ether, tetrahydrofuran, dioxane, dichlorodiethyl ether and polyethers of ethylene oxide and/or propylene oxide; amines such as trimethylamine, triethylamine, tripropylamine, tributylamine, N-methyl-morpholine, pyridine and tetramethylenediamine, nitrohydrocarbons such as nitromethane, nitroethane, nitropropane, nitrobenzene, chloronitrobenzene, o-nitrotoluene; nitriles such as acetonitrile, propionitrile, butyronitrile, isobutyronitrile, benzonitrile, m-chloro-benzonitrile, and compounds such as tetrahydrothiophene dioxide and dimethyl sulphoxide, tetramethylene sulphoxide, dipropyl sulphoxide, benzyl methyl sulphoxide, diisobutyl sulphoxide, dibutyl sulphoxide, diisoamyl sulphoxide; sulphones such as dimethyl sulphone, diethyl sulphone, dipropyl sulphone, dibutyl sulphone, diphenyl sulphone, dihexyl sulphone, methyl ethyl sulphone, ethyl propyl sulphone, ethyl isobutyl sulphone and pentamethylene sulphone; aliphatic, cycloaliphatic or aromatic hydrocarbons such as pentane, hexane, heptane, octane, nonane and industrial hydrocarbons, for example so-called white spirits having components with boiling points in the range, for example, 40 to 250° C., cymene, benzine fractions within a boiling point interval from 70° C. to 190° C., cyclohexane, methylcyclohexane, petroleum ether, ligroin, octane, benzene, toluene, xylene; esters such as methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate, and also dimethyl carbonate, dibutyl carbonate, ethylene carbonate; amides such as hexamethylenephosphoramide, formamide, N-methylformamide, N,N-di-methylformamide, N,N-dipropylformamide, N,N-dibutylformamide, N-methyl-pyrrolidone, N-methyl-caprolactam, 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidine, octylpyrrolidone, octylcaprolactam, 1,3-dimethyl-2-imidazolinedione, N-formylpiperidine, N,N′-1,4-diformylpiperazine; ketones such as acetone, methyl ethyl ketone, methyl butyl ketone.

Of course, mixtures of the solvents and diluents mentioned can also be employed in the process according to the invention.

Preferred diluents are halogenohydrocarbons, in particular chlorohydrocarbons, such as methylene chloride or 1,2-dichloroethane and mixtures of these with other diluents mentioned.

Process 3a is in general carried out by reacting compounds of the formula (II) with compounds of the general formula (III) in one of the given diluents in the presence of one of the given coupling reagents and in the presence of one of the given basic auxiliaries. The reaction time is 4 to 72 hours. The reaction is carried out at temperatures between −10° C. and +120° C., preferably between −5° C. and +50° C., particularly preferably at 0° C. to room temperature. It is carried out under normal pressure.

For carrying out process 3a according to the invention, in general 1.0 to 3.0 mol, preferably 1.0 to 1.5 mol, of coupling reagent are employed per mole of N-acylated N-alkylamino acid of the formula (II).

After reaction is complete, the reaction solution is washed, and the organic phase is separated off, dried and concentrated in vacuo. The products formed can be purified in a customary manner by recrystallization, vacuum distillation or column chromatography (cf. also the Preparation Examples).

Alternatively, the didepsipeptides according to the invention can also be prepared according to classical processes, for example that as is described by H.-G. Lerchen and H. Kunz (Tetrahedron Lett. 26 (43) (1985) p. 5257-5260; 28 (17) (1987) p. 1873-1876) utilizing the esterification method according to B. F. Gisin (Helv. Chim. Acta 56 (1973) p. 1476).

If, in process 3b for the preparation of the new didepsipeptides (Ia) as compounds of the general formula (Ib) methyl N-methyl-L-alanyl-D-lactate and as compounds of the general formula (IV) trimethylallophanoyl chloride are employed, the process can be represented by the following reaction scheme:

Formula (Ib) provides a general definition of the N-terminal-deblocked didepsipeptides needed as starting substances for carrying out process 3b according to the invention. In this formula, R¹, R², R³, R⁴, R⁵ and B preferably represent those radicals which have already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The N-terminal-deblocked didepsipeptides of the general formula (Ib) used as starting materials are known in some cases (cf. DE-OS [German Published Specification] 4 341 991, DE-OS [German Published Specification] 4 341 992, DE-OS [German Published Specification] 4 341 992) or can be obtained from N-terminal-protected didepsipeptides by the processes described there.

Formula (IV) provides a general definition of the compounds additionally to be used as starting substances for carrying out process 3b according to the invention.

In the formula (IV), G, X, Y, and W have the meaning which have already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The compounds of the formula (IV) are generally known compounds of organic chemistry or can be obtained by methods known from the literature (e.g.: per-substituted allophanoyl halides: DE-OS [German Published Specification] 2 008 116; carbamoyl chlorides: Liebigs Ann. 299, p. 85; carbamates: Houben-Weyl, Methoden der organischen Chemie, Volume E 4).

The reaction of the compounds (Ib) with (IV) is preferably carried out using diluents in the presence of a basic reaction auxiliary.

Diluents used for carrying out process 3b according to the invention are the inert, aprotic solvents mentioned in process 3a, e.g. dioxane, acetonitrile or tetrahydrofuran but also halogenohydrocarbons, in particular chlorohydrocarbons, such as methylene chloride.

Basic reaction auxiliaries which can be used for carrying out process 3b according to the invention are all acid-binding agents mentioned in process 3a, but preferably tertiary amines, in particular trialkylamines such as triethylamine, N,N-diisopropylethylamine N-propyl-diisopropylamine, N,N′-dimethyl-cyclohexylamine or N-methylmorpholine.

Process 3b is carried out by reacting compounds of the general formula (Ib) in the presence of a basic reaction auxiliary with compounds of the general formula (IV) in one of the given diluents.

The reaction time is 4 to 72 hours. The reaction is carried out at temperatures between −10° C. and +150° C., preferably between −5° C. and +80° C., particularly preferably at 0° C. to room temperature. It is carried out under normal pressure. For carrying out process 3b according to the invention, in general 1.0 to 3.0 mol, preferably 1.0 to 1.5 mol, of acylating agent are employed per mole of N-alkylamino acid of the formula (Ib).

After reaction is complete, the reaction solution is washed, and the organic phase is separated off, dried and concentrated in vacuo. The products formed can be purified in a customary manner by recrystallization, vacuum distillation or column chromatography (cf. also the Preparation Examples).

If, in process 3c for the preparation of the new didepsipeptides (Ia), as compounds of the general formula (Ib) tert-butyl N-methyl-L-alanyl-D-lactate and as compounds of the general formula (V) trichloroacetyl isocyanate are employed, the process can be represented by the following reaction scheme:

Formula (Ib) provides a general definition of the N-terminal-deblocked didepsipeptides needed as starting substances for carrying out process 3c according to the invention. In this formula, R¹, R², R³, R⁴, R⁵ and B preferably represent those radicals which have already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The N-terminal-deblocked didepsipeptides of the general formula (Ib) used as starting materials are known in some cases (cf. DE-OS [German Published Specification] 4 341 991, DE-OS [German Published Specification] 4 341 992, DE-OS [German Published Specification] 4 341 992) or can be obtained from N-terminal-protected didepsipeptides by the processes described there.

Formulae (V) and (VI) provide a general definition of the compounds additionally to be used as starting substances for carrying out process 3c according to the invention.

In the formula (VI), R⁸, Y, G¹, X¹ and X have the meaning which has already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The compounds of the formula (VI) are generally known compounds of organic chemistry and can be obtained commercially in some cases or by methods known from the literature (Houben-Weyl, Methoden der organischen Chemie, [Methods of organic chemistry] Volume E4).

The reaction of the compounds (Ib) with (VI) by process 3c according to the invention is preferably carried out in the presence of diluents, if appropriate in the presence of a basic reaction auxiliary.

Diluents used for carrying out process 3c according to the invention are the solvents mentioned in process 3a, e.g. nitriles such as acetonitrile, propionitrile, butyronitrile, in particular acetonitrile, and ethers such as ethyl propyl ether, n-butyl ether, diethyl ether, dipropyl esther, diisopropyl ether, di-n-butyl ether, diisobutyl ether, diisoamyl ether, tetrahydrofuran, dioxane, in particular terahydrofuran and dioxane.

Process 3c can also be carried out in the presence of basic reaction auxiliaries. Those basic reaction auxiliaries which can use for carrying out process 3c according to the invention are all acid-binding agents mentioned in process 3a, but preferably tertiary amines, in particular trialkylamines such as triethylamine, N,N-diisopropylethylamine or N-methylmorpholine, and amidine bases or guanidine bases such as diazabicyclo-(4.3.0)nonene (DBN), diazabicyclo (2.2.2)-octane (DABCO), 1,8-diazabicyclo(5.4.0)-undecene (DBU), in particular 1,8-diazabicyclo(5.4.0)-undecene (DBU), use.

Process 3c is carried out by combining compounds of the general formula (Ib) with equimolar amounts of a compound of the formula (VI) in one of the diluents given above, if appropriate in the presence of a basic reaction auxiliary. The reaction time is 1 to 72 hours. The reaction is carried out at temperatures between −50° C. to +200° C., preferably in a temperature range between −20° C. and +150° C., in particular in a temperature range between −10° C. and +120° C.

Fundamentally, it can be carried out under normal pressure, but also at elevated or reduced pressure. The process is preferably carried out at normal pressure or at pressures of up to 15 bar. At higher temperatures, it is advantageous to work at elevated pressure, if appropriate even above 15 bar.

After reaction is complete, the reaction mixture is worked up by generally customary methods (cf. also the Preparation Examples).

Processes for the preparation of organic carbamates from an amine having a basic reaction, carbon dioxide and an alkylating agent in the presence of basic alkali metal, alkaline earth metal or ammonium salts are known (cf. EP-OS [European Published Specification] 511 948, EP-OS [European Published Specification] 628 542 and literature cited there).

It has now been found that even the weakly basic, N-terminal-deblocked didepsipeptides of the formula (Ib) according to the invention, as amino compounds, react with carbon dioxide and an alkylating agent in the presence of metal carbamates to give carbamates of the general formula (Ia).

If, in process 3d for the preparation of the new didepsipeptides (Ia), as compounds of the general formula (Ib) tert-butyl N-methyl-L-alanyl-D-lactate, carbon dioxide, potassium carbonate and as compounds of the general formula (IX) butyl bromide are employed, the process can be represented by the following reaction scheme:

Preferably, in in process 3d the didepsipeptides of the formula (Ib) are employed in which the radicals R¹, R², R³, R⁴, R⁵ and B have the preferred and particularly preferred meanings in the case of the compounds of the general formula (Ia).

The N-terminal-deblocked didepsipeptides of the general formula (Ib) used as starting materials are known in some cases (cf. DE-OS [German Published Specification] 4 341 991, DE-OS [German Published Specification] 4 341 992, DE-OS [German Published Specification] 4 341 992) or can be obtained from N-terminal-protected didepsipeptides by the processes described there.

As carbon dioxide, the customary commercially available product, if appropriate alternatively so-called “dry ice”, can be employed in the process according to the invention.

The alkylating agents of the formula (IX) additionally to be used as starting substances for carrying out process 3d according to the invention are generally known compounds of organic chemistry. In formula (IX) R⁸ has the meaning which has already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention and Hal has the meaning of an electron-withdrawing leaving group.

Suitable leaving groups are, for example, halogen, such as fluorine, chlorine, bromine and iodine, sulphonate such as aryl- and perfluoroalkylsulphonate, monosubstituted diazo and monosubstituted nitrato, and those additionally mentioned in J. March, Advanced Organic Chemistry, 3rd ed., John Wiley & Sons, New York 1985, pp. 310-316.

Compounds having a basic reaction which can be used in the present invention are one or more basic compounds of the elements lithium, sodium, magnesium, potassium, calcium, rubidium, strontium, caesium, barium, and/or of the ammonium ion. Suitable basic compounds are, for example, salts, oxides, hydrides and hydroxides which have a basic reaction. Examples which may be mentioned are: lithium hydride, sodium hydride, potassium hydride, calcium hydride, lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, magnesium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide, lithium oxide, sodium peroxide, potassium oxide, potassium peroxide, calcium oxide, barium oxide, magnesium oxide, strontium oxide, lithium carbonate, lithium hydrogencarbonate, rubidium carbonate, rubidium hydrogencarbonate, caesium hydrogencarbonate, caesium carbonate, lithium cyanide, sodium cyanide, potassium cyanide, rubidium cyanide, ammonium hydrogencarbonate, caesium carbonate, ammonium carbamate, potassium sulphide, potassium hydrogensulphide, sodium sulphide, sodium hydrogensulphide and/or their naturally occurring or synthetically obtainable mixtures, for example dolomite or magnesium oxide carbonate and/or compounds which contain sodium or potassium metal on the corresponding carbonates in dispersed form.

Alkali metal carbonates and/or hydrogencarbonates, however, are preferred, very particularly preferably caesium carbonate or potassium carbonate.

The compounds having a basic reaction can be employed in anhydrous form, or if they are salts which crystallize with water of hydration, also in hydrated form. Preferably, however, anhydrous compounds are used.

Diluents used for carrying out process 3d according to the invention are the solvents mentioned in process 3a, e.g. amides such as hexamethylenephosphoramide, N,N-di-methylformamide, N,N-dipropylformamide, N,N-dibutylformamide, N-methyl-pyrrolidone or N-methyl-caprolactam, in particular N,N-dialkylformamides, such as N,N-dimethylformamide, and sulphoxides such as dimethyl sulphoxide, tetramethylene sulphoxide, dipropyl sulphoxide, benzyl methyl sulphoxide, diisobutyl sulphoxide, dibutyl sulphoxide, diisoamyl sulphoxide, in particular dimethyl sulphoxide.

Alternatively, process 3d can also be carried out in the presence of basic reaction auxiliaries, i.e. in the presence of other bases, for example in an amount of less than 0.5 mol, based on the base employed.

Those basic reaction auxiliaries which can use for carrying out process 3d according to the invention are all acid-binding agents mentioned in process 3a, but preferably tertiary amines, in particular trialkylamines such as triethylamine, N,N-diisopropylethylamine or N-methylmorpholine, and amidine bases or guanidine bases such as 7-methyl-1,5,7-triazabi-cyclo(4.4.0)dec-5-ene (MTBD); diazabicyclo-(4.3.0)nonene (DBN), diazabicyclo(2.2.2)-octane (DABCO), 1,8-diazabicyclo(5.4.0)-undecene (DBU) cyclohexyltetrabutylguanidine (CyTBG), cyclohexyltetramethylguanidine (CyTMG), cyclohexyltetrabutylguanidine, N,N,N,N-tetramethyl-1,8-naphthalenediamine, in particular cyclohexyltetramethylguanidine (CyTMG) and cyclohexyltetrabutylguanidine (CyTBG).

Process 3d is carried out by combining compounds of the general formula (Ib) at room temperature in the presence of carbon dioxide, a 2- to 3-fold excess of alkali metal carbonate of the formula (VII) and an alkylating agent of the formula (IX) in one of the diluents given above, if appropriate in the presence of a basic reaction auxiliary. In a second reaction step, the alkylation of the alkali metal salts of the formula (VIII) formed in situ with compounds of the formula (IX) takes place during a reaction time of 1 to 72 hours and a reaction temperature between −50 and +180° C.; temperatures in the range between −30 and +150° C. are preferred, in particular those in the range −10 to +100° C.

Fundamentally, it can be carried out under normal pressure, but it can also be carried out at elevated or reduced pressure. The process is preferably carried out at normal pressure or at pressures of up to 15 bar. At higher temperatures, it is advantageous to work at elevated pressure, if appropriate even above 15 bar.

The working-up and isolation of the reaction products is carried out by generally customary methods (cf. also the Preparation Examples).

If, in a process 3e for the preparation of the new didepsipeptides (Ia), as compounds of the general formula (Ic) tert-butyl N-methyl-N-(4-nitro-phenoxycarbonyl)-L-alanyl-D-lactate and as a nucleophile of the general formula (X) morpholine is employed, the process can be represented by the following reaction scheme:

Formula (Ie) provides a general definition of the N-terminal-acylated didepsipeptides needed as starting substances for carrying out process 3e according to the invention. In this formula, R¹, R², R³, R⁴, R⁵, G, W, X and B preferably represent those radicals which have already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The N-terminal-acylated didepsipeptides of the general formula (Ib) used as starting materials are known in some cases (cf. DE-OS [German Published Specification] 4 341 991, DE-OS [German Published Specification] 4 341 992, DE-OS [German Published Specification] 4 341 992), can be obtained by the processes described there or can be prepared by process 3b according to the invention shown above.

The nucleophilic agents of the formula (X) additionally to be used as starting substances for carrying out process 3e according to the invention are generally known compounds of organic chemistry. In the formula (X), R⁸ and Y have the meaning which has already been mentioned as preferred in connection with the description of the substances of the general formula (Ia) according to the invention.

Process 3e is carried out by reacting compounds of the general formula (Ie) in the presence of a nucleophilic agent of the formula (X) in one of the diluents given above. The reaction time is 4 to 72 hours. The reaction is carried out at temperatures between +10° C. and +200° C., preferably between +20° C. and +150° C., particularly preferably at boiling temperature of the diluent.

Fundamentally, it can be carried out under normal pressure, but it can also be carried out at elevated or reduced pressure. The process is preferably carried out at normal pressure or at pressures of up to 15 bar. At higher temperatures it is advantageous to work at elevated pressure, if appropriate even above 15 bar.

After reaction is complete, the reaction solution is washed, and the organic phase is separated off, dried and concentrated in vacuo. The products which are formed can be purified in a customary manner by recrystallization, vacuum distillation or column chromatography (cf. also the Preparation Examples).

If, in process 3f for the preparation of the new didepsipeptides (Ia), as compounds of the general formula (Id) N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactic acid and as compounds of the general formula (XI) L-homoproline methyl ester hydrochloride (H-Pec-OME.HCl) are employed, the process can be represented by the following reaction scheme:

Formula (Id) provides a general definition of the C-terminal-deblocked didepsipeptides needed as starting substances for carrying out process 3e according to the invention. In this formula, R¹, R², R³, R⁴, R⁵, G, X and Q preferably represent those radicals which have already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The C-terminal-deblocked didepsipeptides of the general formula (Id) used as starting materials are known in some cases (cf. DE-OS [German Published Specification] 4 341 991, DE-OS [German Published Specification] 4 341 992, DE-OS [German Published Specification] 4 341 992) or can be obtained by the processes described there.

For example, the C-terminal-deblocked didepsipeptides (Id) used as starting materials can be prepared by means of customary methods of a C-terminal deblocking such as acidolysis, for example in the case of a tert-butyl ester, or catalytic hydrogenation, for example in the case of a benzyl ester.

Formula (XI) provides a general definition of the nucleophiles additionally to be used as starting substances for carrying out process 3e according to the invention.

In the formula (XI), B has the meaning which has already been mentioned as preferred for these substituents in connection with the description of the substances of the general formula (Ia) according to the invention.

The compounds of the formula (XI) are generally known compounds of organic chemistry and can be obtained commercially in some cases or by methods known from the literature.

The reaction of the C-terminal-deblocked didepsipeptides of the formula (Id) with compounds of the formula (XI) is preferably carried out using diluents in the presence of coupling reagents and in the presence of a basic reaction auxiliary.

Coupling reagents used for carrying out process 3f are all coupling reagents suitable for the preparation of an amide bond and already employed in process 3a mentioned above.

The preferred coupling is with phosphonium reagents such as bis(2-oxo-3-oxazolidinyl)-phosphonium acid chloride (BOP-Cl), benzotriazol-1-yl-oxy-tris(dimethylamino-phosphonium) hexafluorophosphate (BOP) and phosphonic acid ester reagents, such as diethyl cyanophosphonate (DEPC) or diphenylphosphoryl azide (DPPA).

Basic reaction auxiliaries which can be employed for carrying out process 3f according to the invention are also all acid-binding agents suitable for process 3a.

Preferably, tertiary amines, in particular trialkylamines such as triethylamine N,N-diisopropylethylamine, N-propyl-diisopropylamine, N,N′-dimethyl-cyclohexylamine or N-methylmorpholine are suitable.

Diluents used for carrying out process 3f according to the invention are the solvents mentioned in process 3e, e.g. halogenohydrocarbons, in particular chlorohydrocarbons, such as methylene chloride of 1,2-dichloroethane and mixtures of these with other diluents mentioned.

Process 3j is in general carried out by reacting compounds of the formula (Id) with compounds of the general formula (XI) in one of the given diluents in the presence of one of the given coupling reagents and in the presence of one of the given basic reaction auxiliaries. The reaction time is 4 to 72 hours. The reaction is carried out at temperatures between −10° C. and +120° C., preferably between −5° C. and +50° C., particularly preferably at 0° C. to room temperature. It is carried out under normal pressure.

In general 1.0 to 3.0 mol, preferably 1.0 to 1.5 mol, of coupling reagent are employed per mole of C-terminal-deblocked didepsipeptide of the formula (Id) for carrying out process 3f according to the invention.

After reaction is complete, the reaction solution is washed, and the organic phase is separated off, dried and concentrated in vacuo. The products which are formed can be purified in a customary manner by recrystallization, vacuum distillation or column chromatography (cf. also the Preparation Examples).

Using processes 3a to 3f according to the invention, didepsipeptides of both L- and D-configuration are obtainable from the individual components, retaining the original configuration but also inversion is possible of the starting substances.

By the “inert solvents” described in the above process variants 3a to 3f, in each case solvents are meant which are inert under the respective reaction conditions, but do not have to be inert under any reaction conditions.

The active compounds have favourable toxicity for warm-blooded mammals and are suitable for controlling pathogenic endoparasites which occur in humans and in productive, breeding, zoo, laboratory, experimental animals and pets in animal keeping and animal breeding. In this connection, they are resistant to all or individual stages of development of the pests and to resistant and normally sensitive strains. By controlling the pathogenic endoparasites, disease, cases of death and yield reductions (e.g. in the production of meat, milk, wool, hides, eggs, honey etc.) should be decreased so that as a result of the use of the active compounds more economical and simpler animal keeping is possible. The pathogenic endoparasites include cestodes, trematodes, nematodes, Acantocephalae, in particular:

From the order of the Pseudophyllidea, e.g.: Diphyllobothrium spp., Spirometra spp., Schistocephalus spp., Ligula spp., Bothridium spp. Diphlogonoporus spp.

From the order of the Cyclophyllidea e.g.: Mesocestoides spp., Anoplocephala spp., Paranoplocephala spp., Moniezia spp., Thysanosomsa spp., Thysaniezia spp., Avitellina spp., Stilesia spp., Cittotaenia spp., Andyra spp., Bertiella spp., Taenia spp., Echinococcus spp., Hydatigera spp., Davainea spp., Raillietina spp., Hymenolepis spp., Echinolepis spp., Echinocotyle spp., Diorchis spp., Dipylidium spp., Joyeuxiella spp., Diplopylidium spp.

From the subclass of the Monogenea, e.g. Gyrodactylus spp., Dactylogyrus spp., Polystoma spp.

From the subclass of the Digenea e.g.: Diplostomum spp., Posthodiplostomum spp., Schistosoma spp., Trichobilharzia spp., Ornithobilharzia spp., Austrobilharzia spp., Gigantobilharzia spp., Leucochloridium spp., Brachylaima spp., Echinostoma spp., Echinoparyphium spp., Echinochasmus spp., Hypoderaeum spp., Fasciola spp., Fasciolides spp., Fasciolopsis spp., Cyclocoelum spp., Typhlocoelum spp., Paramphistomum spp., Calicophoron spp., Cotylophoron spp., Gigantocotyle spp., Fischoederius spp., Gastrothylacus spp., Notocotylus spp., Catatropis spp., Plagiorchis spp., Prosthogonimus spp., Dicrocoelium spp., Eurytrema spp., Troglotrema spp., Paragonimus spp., Collyriclum spp., Nanophyetus spp., Opisthorchis spp., Clonorchis spp., Metorchis spp., Heterophyes spp., Metagonismus spp.

From the order of the Enoplida e.g.: Trichuris spp., Capillaria spp., Trichomosoides spp., Trichinella spp.

From the order of the Rhabditia e.g.: Micronema spp., Strongyloides spp.

From the order of the Strongylida e.g.: Stronylus spp., Triodontophorus spp., Oesophagodontus spp., Trichonema spp., Gyalocephalus spp., Cylindropharynx spp., Poteriostomum spp., Cyclococercus spp., Cylicostephanus spp., Oesophagostomum spp., Chabertia spp., Stephanurus spp., Ancylostoma spp., Uncinaria spp., Bunostomum spp., Globocephalus spp., Syngamus spp., Cyathostoma spp., Metastrongylus spp., Dictyocaulus spp., Muellerius spp., Protostrongylus spp., Neostrongylus spp., Cystocaulus spp., Pneumostrongylus spp., Spicocaulus spp., Elaphostrongylus spp., Parelaphostrongylus spp., Crenosoma spp., Paracrenosoma spp., Angiostrongylus spp., Aelurostrongylus spp., Filaroides spp., Parafilaroides spp., Trichostrongylus spp., Haemonchus spp., Ostertagia spp., Marshallagia spp., Cooperia spp., Nematodirus spp., Hyostrongylus spp., Obeliscoides spp., Amidostomum spp., Ollulanus spp.

From the order of the Oxyurida e.g.: Oxyuris spp., Enterobius spp., Passalurus spp., Syphacia spp., Aspiculuris spp., Heterakis spp.

From the order of the Ascaridia e.g.: Ascaris spp., Toxascaris spp., Toxocara spp., Parascaris spp., Anisakis spp., Ascaridia spp.

From the order of the Spirurida e.g.: Gnathostoma spp., Physaloptera spp., Thelazia spp., Gongylonema spp., Habronema spp., Parabronema spp., Draschia spp., Dracunculus spp.

From the order of the Filariida e.g.: Stephanofilaria spp., Parafilaria spp., Setaria spp., Loa spp., Dirofilaria spp., Litomosoides spp., Brugia spp., Wuchereria spp., Onchocerca spp.

From the order of Gigantorhynchida e.g.: Filicollis spp., Moniliformis spp., Macracanthorhynchus spp., Prosthenorchis spp.

The productive and breeding animals include mammals such as cattle, horses, sheep, pigs, goats, camels, water buffalo, donkeys, rabbits, fallow deer, reindeer, fur-bearing animals such as mink, chinchilla, raccoon, birds such as hens, geese, turkeys, ducks, fresh- and salt-water fish such as trout, carp, eels, reptiles, insects such as honey bees and silkworms.

Laboratory and experimental animals include mice, rats, guinea-pigs, golden hamsters, dogs and cats.

The pets include dogs and cats.

Administration can be carried out both prophylactically and therapeutically.

Administration of the active compounds is carried out, directly or in the form of suitable preparations, enterally, parenterally, dermally, nasally, by treatment of the surroundings or with the aid of active compound-containing shaped articles such as strips, disks, tapes, collars, ear tags, limb bands, marking devices.

Enteral administration of the active compounds is carried out, for example, orally in the form of powders, tablets, capsules, pastes, drinks, granules, orally administrable solutions, suspensions and emulsions, boli, medicated feed or drinking water. Dermal administration is carried out, for example, in the form of dipping, spraying or pouring-on and spotting-on. Parental administration is carried out, for example, in the form of injection (intramuscular, subcutaneous, intravenous, intraperitoneal) or by implants.

Suitable preparations are:

-   -   solutions such as injection solutions, oral solutions,         concentrates for oral administration after dilution, solutions         for use on the skin or in body cavities, pouring-on         formulations, gels;     -   emulsions and suspensions for oral or dermal administration and         for injection; semi-solid preparations;     -   formulations in which the active compound is processed in an         ointment base or in an oil-in-water or water-in-oil emulsion         base;

Solid preparations such as powders, premixes or concentrates, granules, pellets, tablets, boli, capsules; aerosols and inhalants, active compound-containing shaped articles.

Injection solutions are administered intravenously, intramuscularly and sub-cutaneously.

Injection solutions are prepared by dissolving the active compound in a suitable solvent and possibly adding additives such as solubilizers, acids, bases, buffer salts, antioxidants, preservatives. The solutions are sterile-filtered and bottled.

Solvents which may be mentioned are: physiologically tolerable solvents such as water, alcohols such as ethanol, butanol, benzyl alcohol, glycerol, propylene glycol, polyethylene glycols, N-methyl-pyrrolidone, and mixtures thereof.

The active compounds can optionally also be dissolved in physiologically tolerable vegetable or synthetic oils which are suitable for injection.

Solubilizers which may be mentioned are: solvents which promote the dissolution of the active compound in the main solvent or prevent its precipitation. Examples are polyvinylpyrrolidone, polyoxyethylated castor oil, polyoxyethylated sorbitan ester.

Preservatives are: benzyl alcohol, trichlorobutanol, p-hydroxybenzoic acid esters, n-butanol.

Oral solutions are administered directly. Concentrates are administered orally after prior dilution to the use concentration. Oral solutions and concentrates are prepared as described above in the case of the injection solutions, where sterile working can be dispensed with.

Solutions for use on the skin are trickled on, spread on, rubbed in, sprinkled on or sprayed on. These solutions are prepared as described above in the case of the injection solutions.

It can be advantageous to add thickeners during preparation. Thickeners are: inorganic thickeners such as bentonites, colloidal silicic acid, aluminium monostearate, organic thickeners such as cellulose derivatives, polyvinyl alcohols and their copolymers, acrylates and methacrylates.

Gels are applied to or spread on the skin or introduced into body cavities. Gels are prepared by treating solutions which have been prepared as described in the case of the injection solutions with sufficient thickener that a clear material having an ointment-like consistency results. The thickeners employed are the thickeners given above.

Pouring-on formulations are poured or sprayed onto limited areas of the skin, the active compound penetrating the skin and acting systemically.

Pouring-on formulations are prepared by dissolving, suspending or emulsifying the active compound in suitable skin-compatible solvents or solvent mixtures. If appropriate, other auxiliaries such as colourants, absorption-promoting substances, antioxidants, sunscreens, adhesives are added.

Solvents which may be mentioned are: water, alkanols, glycols, polyethylene glycols, polypropylene glycols, glycerol, aromatic alcohols such as benzyl alcohol, phenylethanol, phenoxyethanol, esters such as ethyl acetate, butyl acetate, benzyl benzoate, ethers such as alkylene glycol alkyl ethers such as dipropylene glycol monomethyl ether, diethylene glycol mono-butyl ether, ketones such as acetone, methyl ethyl ketone, aromatic and/or aliphatic hydrocarbons, vegetable or synthetic oils, DMF, dimethylacetamide, N-methylpyrrolidone, 2,2-dimethyl-4-oxy-methylene-1,3-dioxolane.

Colourants are all colourants permitted for use on animals and which can be dissolved or suspended.

Absorption-promoting substances are, for example, DMSO, spreading oils such as isopropyl myristate, dipropylene glycol pelargonate, silicone oils, fatty acid esters, triglycerides, fatty alcohols.

Antioxidants are sulphites or metabisulphites such as potassium metabisulphite, ascorbic acid, butylhydroxytoluene, butylhydroxyanisole, tocopherol.

Sunscreens are, for example, novantisolic acid.

Adhesives are, for example, cellulose derivatives, starch derivatives, polyacrylates, natural polymers such as alginates, gelatin.

Emulsions can be administered orally, dermally or as injections.

Emulsions are either of the water-in-oil type or of the oil-in-water type.

They are prepared by dissolving the active compound either in the hydrophobic or in the hydrophilic phase and homogenizing this with the solvent of the other phase with the aid of suitable emulsifiers and, if appropriate, other auxiliaries such as colourants, absorption-promoting substances, preservatives, antioxidants, sunscreens, viscosity-enhancing substances.

Hydrophobic phases (oils) which may be mentioned are: liquid paraffins, silicone oils, natural vegetable oils such as sesame oil, almond oil, castor oil, synthetic triglycerides such as caprylic/capric biglyceride, triglyceride mixture with vegetable fatty acids of the chain length C₈₋₁₂ or other specially selected natural fatty acids, partial glyceride mixtures of saturated or unsaturated fatty acids possibly also containing hydroxyl groups, mono- and diglycerides of the C₈/C₁₀ fatty acids.

Fatty acid esters such as ethyl stearate, di-n-butyryl adipate, hexyl laurate, dipropylene glycol perlargonate, esters of a branched fatty acid of medium chain length with saturated fatty alcohols of chain length C₁₆-C₁₈, isopropyl myristate, isopropyl palmitate, caprylic/capric acid esters of saturated fatty alcohols of chain length C₁₂-C₁₈, isopropyl stearate, oleyl oleate, decyl oleate, ethyl oleate, ethyl lactate, waxy fatty acid esters such as synthetic duck coccygeal gland fat, dibutyl phthalate, diisopropyl adipate, ester mixtures related to the latter, inter alia.

Fatty alcohols such as isotridecyl alcohol, 2-octyldodecanol, cetylstearyl alcohol, oleyl alcohol.

Fatty acids such as oleic acid and its mixtures.

Hydrophilic phases which may be mentioned are: water, alcohols such as propylene glycol, glycerol, sorbitol and its mixtures.

Emulsifiers which may be mentioned are: non-ionic surfactants, e.g. polyethoxylated castor oil, polyethoxylated sorbitan monooleate, sorbitan monostearate, glycerol monostearate, polyoxyethyl stearate, alkylphenol polyglycol ether;

-   -   ampholytic surfactants such as di-Na         N-lauryl-β-iminodipropionate or lecithin;     -   anionic surfactants, such as Na lauryl sulphate, fatty alcohol         ether sulphates, mono/dialkyl polyglycol ether orthophosphoric         acid ester monoethynolamine salt.

Further auxiliaries which may be mentioned are: substances which enhance the viscosity and stabilize the emulsion, such as carboxymethylcellulose, methylcellulose and other cellulose and starch derivatives, polyacrylates, alginates, gelatin, gum arabic, polyvinylpyrrolidone, polyvinyl alcohol, copolymers of methyl vinyl ether and maleic anhydride, polyethylene glycols, waxes, colloidal silicic acid or mixtures of the substances mentioned.

Suspensions can be administered orally, dermally or as an injection. They are prepared by suspending the active compound in a suspending agent, if appropriate with addition of other auxiliaries such as wetting agents, colourants, absorption-promoting substances, preservatives, antioxidants light screens.

Suspending agents which may be mentioned are all homogeneous solvents and solvent mixtures.

Wetting agents (dispersants) which may be mentioned are the surfactants given above.

Other auxiliaries which may be mentioned are those given above.

Semi-solid preparations can be administered orally or dermally. They differ from the suspensions and emulsions described above only by their higher viscosity.

For the production of solid preparations, the active compound is mixed with suitable excipients, if appropriate with addition of auxiliaries, and brought into the desired form.

Excipients which may be mentioned are all physiologically tolerable solid inert substances. Those used are inorganic and organic substances. Inorganic substances are, for example, sodium chloride, carbonates such as calcium carbonate, hydrogencarbonates, aluminium oxides, silicic acids, argillaceous earths, precipitated or colloidal silica, phosphates.

Organic substances are, for example, sugar, cellulose, foodstuffs and feeds such as milk powder, animal meal, grain meals and shreds, starches.

Auxiliaries are preservatives, antioxidants, colourants which have already been mentioned above.

Other suitable auxiliaries are lubricants and glidants such as magnesium stearate, stearic acid, talc, bentonites, disintegration-promoting substances such as starch or crosslinked polyvinylpyrrolidone, binders such as starch, gelatin or linear poly-vinylpyrrolidone, and dry binders such as microcrystalline cellulose.

The active compounds can also be present in the preparations as a mixture with synergists or with other active compounds which act against pathogenic endoparasites. Such active compounds are, for example, L-2,3,5,6-tetrahydro-6-phenylimidazolthiazole, benzimidazole carbamates, praziquantel, pyrantel, febantel.

Ready-to-use preparations contain the active compound in concentrations of 10 ppm-20 percent by weight, preferably from 0.1-10 percent by weight.

Preparations which are diluted before use contain the active compound in concentrations of 0.5-90% by weight, preferably of 5-50% by weight.

In general, it has proved advantageous to administer amounts of approximately 1 to approximately 100 mg of active compound per kg of body weight per day to achieve effective results.

EXAMPLE 1

In vivo Nematode Test

Trichostrongylus colubriformis/Sheep

Sheep experimentally infected with Trichostrongylus colubriformis were treated after expiry of the prepatency time of the parasite. The active compounds were administered orally and/or intravenously as pure active compound.

The degree of effectiveness is determined by quantitatively counting the worm eggs excreted with the faeces before and after treatment.

Complete cessation of oviposition after treatment means that the worms have been expelled or are so damaged that they no longer produce eggs (effective dose).

Active compounds tested and effective doses can be seen from the following table.

Active compound Effective dose Example No. in [mg/kg]  2 5  9 5 11 5 12 5 13 5 18 5 I - 7 5 46 5 68 5

EXAMPLE B

In vivo Nematode Test

Haemonchus contortus/Sheep

Sheep experimentally infected with Haemonchus contortus were treated after expiry of the prepatency time of the parasite. The active compounds were administered orally and/or intravenously as pure active compound.

The degree of effectiveness is determined by quantitatively counting the worm eggs excreted with the faeces before and after treatment.

Complete cessation of oviposition after treatment means that the worms have been expelled or are so damaged that they no longer produce eggs (effective dose).

Active compounds tested and effective doses can be seen from the following tables.

Active compound Effective dose Example No. in [mg/kg]  2 5  8 5  9 5 10 5 11 5 12 5 19 5 20 5 30 5 31 5 34 5 35 5 36 5 38 5 47 5 49 5 50 5 68 5 61 5 I - 4 5 I - 5 5 I - 7 5

PREPARATION EXAMPLES

Preparation by Process 3a

Example 1 Isobutyl N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactate

2.9 g (22.9 mmol) of N,N-diisopropylethylamine (“Hünig's base”) and 2.9 g (11.4 mmol) of bis(2-oxo-3-oxazolidinyl)-phosphonium acid chloride (BOP-Cl) are added at 0° C. to a solution of 2.4 g (10.4 mmol) of N-methyl-N-trimethylallophanoyl-L-alanine and 1.5 g (10.4 mmol) of isobutyl D-lactate in 20 ml of methylene chloride and the mixture is stirred at room temperature for 18 [lacuna]. The reaction solution is shaken twice with water, and the organic phase is separated off and concentrated in vacuo after drying over sodium sulphate. The residual crude product is chromatographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the eluent cyclohexane: acetone (4:1). 1.6 g (57.2% of theory) of isobutyl N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactate are obtained.

¹H-NMR (400 MHz, CDCl₃, δ): 0.92; 0.94 (d, 6H, 2×—CH₃; J=6.7 Hz); 2.91; 2.92; 2.94 (3s, 9H, 3×N—CH₃); 3.06 (s, 3H, —N—CH₃); 3.92 (m, 3H, —O—CH₂)—; 5.14 (m, 1H, CH) ppm

GC-MS m/z (%): 360 (MH⁺, 100); 271 (38); 214 (62).

Preparation by Process 3b

Example 2 Methyl N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactate

3.8 g (29.1 mmol) of N,N-diisopropylethylamine (“Hünig's base”) and 2.1 g (12.7 mmol) of trimethylallophanoyl chloride are added at 0° C. to a solution of 2.0 g (10.6 mmol) of methyl N-methyl-L-alanyl-D-lactate in 100 ml of methylene chloride, and the mixture is stirred at 0° C. for two hours and then at room temperature for about 18 hours. The reaction solution is shaken twice with water, and the organic phase is separated off and concentrated in vacuo after drying over sodium sulphate. The residual crude product is chromatographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the eluent cyclohexane:ethyl acetate (3:1). 1.35 g (40.2% of theory) of methyl N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactate are obtained.

¹H-NMR (400 MHz, CDCl₃, δ): 1.46; 1.49 (2d, 6H, 2×—CH₃; J=7.2 Hz); 2.91; 2.92; 2.93 (3s, 9H, 3×N—CH₃); 3.06 (s, 3H, —N—CH₃); 3.75 (s, 3H, —O—CH₃); 4.49; 5.13 (2q, 2H, 2×CH; J=7.2 Hz) ppm

EI-MS m/z (%): 317 (M⁺, 1); 286 (M⁺-OMe, 1); 273 (M⁺-CO₂, 7); 214 (3); 186 (40); 72 (100).

Preparation by Process 3c

Example 3 tert-Butyl N-methyl-N-trichloroacetylaminocarbonyl-L-alanyl-D-lactate

2.4 g (12.9 mmol) of trichloroacetyl isocyanate are added at 0° C. to a solution of 3.0 g (12.9 mmol) of tert-butyl N-methyl-L-alanyl-D-lactate in 30 ml of acetonitrile, and the mixture is stirred at 0° C. for two hours and then at room temperature for about 18 hours. The reaction solution is shaken twice with water, and the organic phase is separated off and concentrated in vacuo after drying over sodium sulphate. The residual crude product is chromatographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the eluent cyclohexane:acetone (4:1). 4.2 g (77.2% of theory) of tert-butyl N-methyl-N-trichloro-acetyl-L-alanyl-D-lactate are obtained.

¹H-NMR (400 MHz, CDCl₃, δ): 1.49; (s, 9H, —O-tBu); 1.40; 1.47; (2d, 6H, 2 x—CH₃; J=6.9 Hz); 2.95 (s, 3H, —N—CH₃); 3.98; 4.22 (2q, 2H, 2×CH; J=6.9 Hz); 9.05 (br., 1H, —CO—NH—CO) ppm

Preparation by Process 3d

Example 4 tert-Butyl N-butyloxycarbonyl-N-methyl-L-alanyl-D-lactate

2.0 g (8.6 mmol) of tert-butyl N-methyl-L-alanyl-D-lactate, 2.1 g (15.2 mmol of potassium carbonate and 30 ml of dimethyl sulphoxide are gassed with carbon dioxide for one hour and then treated with 1.2 g (8.6 mmol) of butyl bromide. The reaction mixture was stirred at room temperature for 48 hours, then separated off from the solid, the volatile components were stripped off under reduced pressure, the residue was extracted with chloroform-water and the organic phase was separated off. The organic phase is then dried over sodium sulphate and concentrated in vacuo, and the residual oil is chromatographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm).

¹H-NMR (400 MHz, CDCl₃, δ): 1.46; (s, 9H, —O-tBu) ppm EI-MS m/z %: 331 (M⁺, 0.5); 275 (M⁺-H₂C═CMe₂, 5); 158 (100).

Preparation by Process 3e

Example 5 tert-Butyl N-methyl-N-(4-nitro-phenoxy)carbonyl-L-alanyl-D-lactate

6.15 g (47.5 mmol) of N,N-diisopropylethyl-amine (“Hünig's base”) and 4.4 g (21.6 mmol) of 4-nitrophenyl chloroformate are added at 0° C. to a solution of 5.0 g (21.6 mmol) of tert-butyl N-methyl-L-alanyl-D-lactate in 150 ml of methylene chloride, and the mixture is stirred at 0° C. for two hours and then at room temperature for about 18 hours. The reaction solution is shaken twice with water, and the organic phase is separated off and concentrated in vacuo after drying over sodium sulphate. The residual crude product is chromatographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the eluent cyclohexane:acetone (10:1).

¹H-NMR (400 MHz, CDCl₃, δ): 7.31; 8.24 (2d, 4H, 4-NO₂-phenoxy) ppm EI-MS m/z (%): 340 (M⁺-H₂C═CMe₂, 2); 202 (100).

Example 6 tert-Butyl N-methyl-N-morpholinocarbonyl-L-alanyl-D-lactate

0.65 g (5.0 mmol) of N,N-diisopropylethylamine (“Hünig's base”) and 0.45 g (5.0 mmol) of morpholine are added at room temperature to a solution of 2.0 g (5.0 mmol) of tert-butyl N-methyl-N-(4-nitro-phenoxy)carbonyl-L-alanyl-D-lactate in 40 ml of methylene chloride, and the mixture is stirred at reflux temperature for 18 hours. During the course of this a strong yellow colouration of the reaction mixture occurs. The reaction solution is shaken twice with water, and the organic phase is separated off and concentrated in vacuo after drying over sodium sulphate. The residual crude product is chroratographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the eluent cyclohexane:ethyl acetate (1:1).

¹H-NMR (400 MHz, CDCl₃, δ): 1.42; 1.46 (s/2d, 15H, —O-tBu/-CH₃); 2.90 (s, 3H, —N-Me) 3.25 (m, 4H, —CH₂—O—CH₂—); 3.68 (m, 4H, —CH₂—N—CH₂—); 4.69; 4.96 (2q, 2H, -2×—CH—) ppm

EI-MS m/z (%): 344 (M⁺, 4); 171 (100).

Preparation by Process 3f

Example 7 N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactic Acid

Dry hydrogen chloride gas is passed into a solution, cooled to 0° C., of 11.8 g (32.8 mmol) of tert-butyl N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactate in 250 ml of absolute methylene chloride for 20 minutes. The mixture is then stirred at room temperature for about 16 hours and the entire reaction mixture is concentrated in vacuo.

10.0 g (100% of theory) of N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactic acid are obtained, which can be reacted further without further purification.

¹H-NMR (400 MHz, CDCl₃, δ): 1.46; 1.51 (2d, 2H, 2×—CH₃; J=7.2 Hz); 2.91; 2.94; 3.05 (3s, 12H, 4×N-Me); 4.84; 5.17 (2q, 2H, —CH—, J=7.2 Hz) ppm EI-MS m/z (%); 304 (MH⁺, 0.1); 259 (2); 214 (1); 186 (15); 129 (15); 72 (52); 58 (100).

Example 8 N-methyl-N-trimethylallophanoyl-L-alanyl-D-lactyl-L-homoproline Methyl Ester

2.8 g (21.8 mmol) of N,N-diisopropylethylamine (“Hünig's base”) and 1.85 g (7.25 mmol) of bis(2-oxo-3-oxa-zolidinyl)-phosphonium acid chloride (BOP-Cl) are added at 0° C. to a solution of 2.0 g (6.6 mmol of N-methyl-N-trimethylallo-phanoyl-L-alanyl-D-lactic acid and 1.3 g (7.25 mmol) of L-homoproline methyl ester hydrochloride (H-Pec-OMe.HCl) in 100 ml of methylene chloride and the mixture is stirred at 0° C. for 30 minutes, then at room temperature for 18 hours. The reaction solution is shaken twice with water, and the organic phase is separated off and concentrated in vacuo after drying over sodium sulphate. The residual crude product is chroma-tographed on a LiChroprep RP-18 column (LiChroprep RP-18—Merck, particle size: 0.04 to 0.063 mm) using the eluent acetonitrile-water (3:7). 0.32 g (11.3% of theory) is obtained.

EI-MS m/z (%): 428 (M⁺, 2); 397 (2); 352 (17); 186 (38); 72 (100).

The compounds of the general formula (Ia) shown in Table 1 below can be prepared analogously to processes 3a-f.

TABLE 1 Examples of compounds of the formula (Ia) (Ia)

Ex. No. Q G═X R¹ R² R³ R⁴ R⁵ B Physical Data^(a)) 9 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —O-^(t)Bu 316 (MH⁺, 9); 260 (MH⁺- H₂C═CMe₂, 100) 10 Me₂CH—CH₂—O— C═O -Me -Me —H —H -Me —O-^(t)Bu 331 (M⁺, 1); 158 (100) 11 (Me-CH₂—)₂N— C═O -Me -Me —H —H -Me —O-^(t)Bu 430 (M⁺, 0.2); 100 (100) 12 Me-O— C═O -Me -Me —H —H -Me —O-^(t)Bu 290 (MH⁺, 11); 234 (MH⁺- H₂C═CMe₂, 100) 13 Me-CH₂—O— C═O -Me -Me —H -Me —O-^(t)Bu 303 (M⁺, 0.2); 247 (M⁺- H₂C═CMe₂, 8) 14 Me-(CH₂)₂—O— C═O -Me -Me —H —H -Me —O-^(t)Bu 317 (M⁺, 0.2); 261 (M⁺- H₂C═CMe₂, 8) 15 H₂C═CMe-O— C═O -Me -Me —H —H -Me —O-^(t)Bu 315 (M⁺, 0.2) 16 Cyclohexyl-CH₂—O— C═O -Me -Me —H —H -Me —O-^(t)Bu 371 (M⁺, 0.5; 198 (100) 17 Me₂CH—(CH₂)₂—O— C═O -Me -Me —H —H -Me —O-^(t)Bu 345 (M⁺, 1); 172 (100) 18 Me₂N—CO—NMe- C═O -Me -Me —H —H -Me —O-^(t)Bu 359 (M⁺, 0.6); 72 (100) 19 Me₂CH—O— C═O -Me -Me —H —H -Me —O-^(t)Bu 317 (M⁺, 0.5); 144 (100) 20 Me-CH₂—CHMe-O— C═O -Me -Me —H —H -Me —O-^(t)Bu 331 (M⁺, 0.5); 158 (100) 21 Me₂CH—CH₂—O— C═O -Me —Et —H —H -Me —O-^(t)Bu 345 (M⁺, 0.5; 172 (100) 22 Me₂CH—CH₂—O— C═O -Me -Me —H —H -Me —NMe-nBu 358 (M⁺, 9); 116 (100) 23 Me₂CH—CH₂—O— C═O -Me -sBu —H —H -Me —O-^(t)Bu 373 (M⁺, 0.5); 200 (100) 24 Me-(CH₂)₃—S— C═O -Me -Me —H —H -Me —O-^(t)Bu 347 (M⁺, 3); 174 (100) 25 Me₂CH—CH₂—O— C═O -Me -Me —H —H —H —O-^(t)Bu 317 (M⁺, 0.5); 158 (100) 26 Me₂N—CO—NMe- C═O -Me —H —H —H -Me —O-^(t)Bu 345 (M⁺, 0.1; 72 (100) 27 Me₂CH—CH₂—O— C═O -Me —H —H —H -Me —O-^(t)Bu 1.46 (s, 9H, tBu)^(b)) 28 Me₂N—CO—NMe- C═O -Me -nPr —H —H -Me —O-^(t)Bu 387 (M⁺, 0.2); 72 (100) 29 Me₂CH—CH₂—O— C═O -Me -nPr —H —H -Me —O-^(t)Bu 304 (M⁺- H₂C═CMe₂, 100) 30 Me₂N—CO—NMe- C═O -Me -nPr —H —H -Me —NMe-sBu 31 Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

370 (M⁺, 0.2); 72 (100) 32 Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

384 (M⁺, 0.2; 340 (M⁺-CO₂, 26); 72 (100) 33 Me₂N—CO—NPr- C═O -Me -Me —H —H -Me

398 (M⁺, 0.5); 72 (100) 34 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

376 (M⁺, 12); 72 (100) 35 Et₂N— C═O -Me -Me —H —H -Me

341 (M⁺, 6); 100 (100) 36 Et₂N— SO₂ -Me -Me —H —H -Me

349 (M⁺; 0.5); 165 (100) 37 Me-CH₂—CHMe-O— C═O -Me -Me —H —H -Me

342 (M⁺, 10); 102 (100) 38 Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

326 (M⁺-72, 28); 100 (100) 39 Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

385 (MH⁺; 0.5); 384 (M⁺; 1); 72 (100) 40 Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

399 (MH⁺; 0.5); 398 (M⁺; 1), 72 (100) 41 Et₂N—CO—NMe- C═O -Me -Me —H —H -Me

398 (M⁺; 0.5); 72 (100) 42 (H₂C═CH—CH₂)₂N— C═O -Me -Me —H —H -Me —O-^(t)Bu 358 (M⁺; 13); 128 (100) 43 (Me₂CH)₂N— C═O -Me -Me —H —H -Me —O-^(t)Bu 44 Me₂N— C═O -Me -Me —H —H -Me —O-^(t)Bu 302 (M⁺; 3); 129 (100) 45 Me-CH₂—CHMe-O— C═O -Me -Me —H —H -Me —O-Me 289 (M⁺; 8); 102 (100) 46 Me-O— C═O -Me -Me —H —H -Me —O-Me 247 (M⁺; 1); 116 (100) 47 Me₂N—CO—NPr- C═O -Me -Me —H —H -Me —O-Me 345 (M⁺; 0.5); 72 (100) 48 Et₂N—CO—NMe- C═O -Me -Me —H —H -Me —O-Me 346 (M⁺+H; 44); 100 (100) 49 Et₂N— C═O -Me -Me —H —H -Me —O-Me 288 (M⁺; 2); 100 (100) 50 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —O-Me 273 (M⁺; 12); 142 (100) 51 Phenyl-O— C═O -Me -Me —H —H -Me —O-^(t)Bu 295 (M⁺; H₂C═CMe₂; 3); 202 (100) 52 H₂C═CMe-CH₂— SO₂ -Me -Me —H —H -Me —O-^(t)Bu 350 (M⁺+H; 5); 294 (71); 176 (100) 53 F₂C═CF—CH₂—CH₂—O— C═O -Me -Me —H —H -Me —O-^(t)Bu 383 (M⁺+5); 210 (100) 54 H₂C═CH—CH₂—O— C═O -Me -iBu —H —H -Me —O-^(t)Bu 358 (M⁺+H, 10) 184 (100 55 H₂C═CH—CH₂—O— C═O -Me -iBu —H —H -Bn —O-^(t)Bu 434 (M⁺+H, 8); 184 (100 56 Benzyl-O— C═O -Me -Bn —H —H -iBu —O-Me 57 tBu—O— C═O —H 1'Bn —H —H -iPr

232 (M⁺+H; 38); 100 (100) 58 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

328 (m⁺; 5); 142 (100) 59 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

341 (M⁺; 22); 70 (100) 60 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

440 (M⁺; 2); 340 (100) 61 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

454 (M⁺; 12); 340 (100) 62 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me —NMe-O-Me 302 (M⁺; 0.5); 142 (100) 63 H₂C═CH—CH2—O— C═O -Me -Me —H —H -Me —NMe(CH₂)₂—NMe₂ 343 (M⁺; 0.5); 58 (100) 64 H₂C═CH—CH2—O— C═O -Me -Me —H —H -Me

363 (M⁺; 32); 142 (100) 65 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

399 (M⁺; 2); 142 (100) 66 H₂C═CH—CH—O— C═O -Me -Me —H —H -Me

404 (M⁺; 52); 107 (100)= 67 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

404 (M⁺; 7); 133 (100) 68 H₂C═CH—CH2_(O)- C═O -Me -Me —H —H -Me

405 (M⁺; 33); 142 (100) 69 tBu-O— C═O -Me -Me —H —H -Me —O-Bn 365 (M⁺; 0.5); 58 (100) 70 tBu-O— C═O -Me -Me —H —H -Me —OH 275 (M⁺; ); 58 (100) 71 tBu-O— C═O -Me -Me —H —H -Me

341 (MH⁺; 100); 141 (38) 72 tBu-O— C═O -Me -Me —H —H -Me

384 (MH⁺; 100); 141 (47) 73 tBu-O— C═O -Me -Me —H —H -Me

434 (MH⁺; 100); 141 (59) 74 tBu-O— C═O -Me -Me —H —H -Me

414 (MH⁺; 100); 141 (43) 75 Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

449 (M⁺; 22); 79 (100)) 76 tBu-O— C═O -Me -Me —H —H -Me

344 (MH⁺; 100); 244 (44) 77 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

78 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

369 (M⁺; 19); 354 (M⁺−Me, 100) 79 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

385 (M⁺; 1); 340 (100)( 80 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

461 (M⁺; 12); 135 (100) 81 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

438 (M⁺; 1); 340 (100) 82 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

83 H₂C═CH—CH₃—O— C═O -Me -Me —H —H -Me

84 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

85 tBu-O— C═O -Me -Me —H —H -Me

86 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

426 (M⁺; 5); 100 (100) 87 tBu-O— C═O -Me -Me —H —H -Me

443 (M⁺; 4); 58 (100) 88 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

419 (M⁺; 100); 204 (22) 89 H₂═CH—CH₂—O— C═O -Me -Me —H —H -Me

340 (M⁺; 8); 142 (100) 90 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

312 (M⁺; 9); 142 (100) 91 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

419 (M⁺; 17); 141 (4) 92 H₂C═CH—CH₂—O— C═O -Me -Me —H —H -Me

409 (M⁺; 25); 124 (100) 93 Me₂N— C═O -Me -Me —H —H -Me —O-Me 261 (M⁺; 1); 72 (100) 94 Me₂N— SO₂ -Me -Me —H —H -Me —O-Me 296 (M⁺; 2); 165 (100) 95

C═O -Me -Me —H —H -Me —O-Me 302 (M⁺; 1); 114 (100) 96 Me-O—CO— C═O -Me -Me —H —H -Me —O-Me 275 (M⁺; 3); 144 (100) 97 H₂C═CMe-CH₂— SO₂ -Me -Me —H —H -Me —O-Me 98

SO₂ -Me -Me —H —H -Me —O-Me 336 (M²; 2); 205 (100) 99

C═O -Me -Me —H —H -Me —O-Me 359 (M⁺; 1); 114 (100) 100 Me₂N—CO—NEt— C═O -Me -Me —H —H -Me —O-Me 331 (M⁺; 1); 72 (100) 101

SO₂ -Me -Me —H —H -Me —O-Me 338 (M⁺; 3); 217 (100) 102 Me₂N—CO—NEt— C═O -Me -Me —H —H -Me

385 (M⁺; 1); 72 (100) 103

C═O -Me -Me —H —H -Me

412 (M⁺; 1); 114 (100) 104

SO₂ -Me -Me —H —H -Me

392 (MH⁺; 100); 207 (28) 105 H₂C═CH—CH₂—O— C═O -Me -iPr —H —H -Me

354 (M⁺; 2); 170 (100) 106 Me₂N—CO—NMe- C═O -Me -iPr —H —H -Me

399 (M⁺; 0.5); 72 (100) 107 H₂C═CH—CH₂—O— C═O -Me -Bn —H —H -Me

402 (M⁺; 16); 139 (100) 108 Me₂N—CO—NMe- C═O -Me -Bn —H —H -Me

446 (M⁺; 0.5); 72 (100) 109 H₂C═CH—CH₂O— C═O -Me -sBU —H —H -iPr

396 (M⁺; 2); 184 (100) 110 Me₂N—CO—NMe- C═O -Me -sBU —H —H -iPr

111 Cl—CHMe-O— C═O -Me -Me —H —H -Me —O-Me 295 (M⁺; 2); 164 (100) 112 Ac-O—CHMe-O— C═O -Me -Me —H —H -Me —O-Me 113 Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

485 (M⁺; 2); 72 (100) 114 Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

115 Me₂N—CO—NMe- C═O -Me -Me —H —H -Me

Abbreviation: Ac: -acetyl; Me: -methyl, Et: -ethyl; Pr: -propyl; Bu: -butyl; Bn: -benzyl; i-, s- and t-: iso-; secondary- and tertiary ^(a))FAB-MS, MS-APCl or Al-MS m/z (%). ^(b)) ¹H-NMR (400 MHz, CDCl₃, δ) in ppm Starting Substances of the Formula (I)

Example (I-1) N-Benzyl-N-methyl-L-alanyl-D-lactic Acid Piperidide

5.4 g (41.4 mmol) of N,N-diisopropylethylamine (Hünig's base) and 5.3 g (20.7 mmol) of bis(2-oxo-3-oxazolidinyl)-phosphonium acid chloride (BOP-Cl) are added at 0° C. to a solution of 5.0 g (18.8 mmol) of N-benzyl-N-methyl-L-alanyl-D-lactic acid and 1.6 g (20.7 mmol) of piperidine in 150 ml of methylene chloride, and the mixture is stirred at 0° C. for two hours and then at room temperature for 18 hours. The residual crude product is chromatographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the eluent cyclohexane:ethyl acetate (3:1). 3.5 g (55.8% of theory) of N-benzyl-N-methyl-L-alanyl-D-lactic acid piperidide are obtained.

EI-MS m/z (%): 332 (M⁺, 1); 213 (2); 192 (2); 148 (100); 120 (35); 91 (55)

Example (I-2) Methyl-L-alanyl-D-lactic Acid Piperidide

3.3 g (9.9 mmol) of N-benzyl-N-methyl-L-alanyl-D-lactic acid piperidide are hydrogenated in 100 ml of ethanol in the presence of 0.35 g of Pd(OH)₂-carbon [20% Pd content] until absorption of hydrogen is complete (about 4 hours). After filtering off the catalyst, the entire reaction solution is concentrated in vacuo. 2.4 g (100% of theory) of N-methyl-L-alanyl-D-lactic acid piperidide are obtained.

GC-MS m/z (%): 243 (MH⁺, 100); 158 (32)

Example (I-3) Methyl N-benzyl-N-methyl-L-alanyl-D-lactate

The coupling reaction is carried out analogously to the reaction procedure of Example 1 using:

-   -   18.5 g (95.7 mmol) of N-benzyl-N-methyl-L-alanine,     -   10.0 g (95.7 mmol) of methyl (R)-(+)-lactate,     -   300 ml of absol. methylene chloride,     -   36.7 g (284.5 mmol) of N,N-diisopropylethylamine (“Hünig's         base”),     -   29.0 g of bis(2-oxo-3-oxazolidinyl)-phosphonium acid chloride         (BOP-Cl).

The residual crude product is chromatographed on a silica gel column (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the eluent cyclohexane:ethyl acetate (3:1). 5.6 g (20.9% of theory of methyl N-benzyl-N-methyl-L-alanyl-D-lactate are obtained.

EI-MS m/z (%): 279 (M⁺, 11); 148 (Ph-CH₂—NMe-CHMe, 100); 91 (Ph-CH₂—, 99).

The starting substances of the general formula (I) shown in Table 2 below can be prepared analogously to examples (I-1) to (I-3).

TABLE 2 Examples of compounds of the formula (I)

Ex. No. A R¹ R² R³ R⁴ R⁵ B Physical Data^(a)) I-4 —CO—O-Benzyl -Me -Me —H —H -Me —O-^(t)Bu I-5 —CO—O-Benzyl -Me -Me —H —H -Me —OH I-6 —CO—O-Benzyl -Me —H —H —H -Me —O-^(t)Bu I-7 —CO—O-Benzyl -Me —H —H —H -Me —OH I-8 —CO—O-^(t)Bu -Me —CHMe —H —H -Me —O-Bn (O-Bn) I-9 -Benzyl -Me -Me —H —H -Me —NMe-nBu 334 (M⁺, 7); 148 (100) I-10 —H -Me -Me —H —H -Me —NMe-nBu 244 (M⁺, 0.5); 58 (100) I-11 -Benzyl -Me -Me —H —H -Me —O-iBu 448 (M⁺, 1); 148 (100) I-12 —H -Me -Me —H —H -Me —O-iBu 232 (MH⁺, 100) I-13 -Benzyl -Me -Me —H —H -Me —NMe-sBu 334 (M⁺, 1); 148 (100) I-14 —H -Me -Me —H —H -Me —NMe-sBu I-15 -Benzyl -Me -Me —H —H -Me

346 (M⁺, 1); 148 (100) I-16 —H -Me -Me —H —H -Me

257 (MH⁺, 100) I-17 —H -Me -Me —H —H -Me —O-Me 3,76 (s, 3H, —O-Me)^(b)) I-18 -Benzyl -Me -Me —H —H -Me

360 (M⁺, 4); 148 (100) I-19 —H -Me -Me —H —H -Me

I-20 -Benzyl -Me -Me —H —H -Me

360 (M⁺, 3); 148 (100) I-21 —H -Me -Me —H —H -Me

271 (MH⁺, 2); 58 (100) I-22 -Benzyl -Me -Me —H —H -Me

346 (M⁺, 2); 148 (100) I-23 —H -Me -Me —H —H -Me

I-24 -Benzyl -Me -iBu —H —H —H —O-^(t)Bu 350 (M⁺+H, 16); 190 (100) I-25 -Benzyl -Me -iBu —H —H —H —OH 272 (M⁺−21); 100 (100) I-26 —H -Me -iBu —H —H —H —O-^(t)Bu 260 (M⁺+H, 100); 204 (74) I-27 -Benzyl -Me -iBu —H —H —H —O-Me 306 (M⁺−H, 20); 307 (M⁺, 16); 91 (100) I-28 -Benzyl -Me -iBu —H —H —H —O—Et I-29 -Benzyl -Me -iBu —H —H -Bn —OH 384 (M⁺+H, 42); 91 (100) I-30 -Benzyl —H -iBu —H —H -Me —O-^(t)Bu 350 (M⁺+H, 100); 348 (20) I-31 -Benzyl -Me -iBu —H —H -Bn —O-Me 348 (M⁺+H, 17); 396 (M−H, 18), 190 (100) I-32 -Benzyl —H -iBu —H —H -Me —OH 294 (M⁺+H, 36); I-33 —H -Me -iBu —H —H -Bn —O-Me 308 (M⁺+H, 100) I-34 —H —H -iBu —H —H -Bn —O-Me I-35 -Benzyl -Me -iBu —H —H -Me —O-Me 322 (M⁺+H, 16); 320 (M⁺−H, 26); 190 (100) I-36 —H -Me -iBu —H —H -Me —O-Me 232 (M⁺+H, 38); 100 (100) I-37 -Benzyl —H -nPr —H —H -Me —O-^(t)Bu 336 (M⁺+H, 100) I-38 -Benzyl —H -nPr —H —H -Me —OH 280 (M⁺+H, 100); 91 (62) I-39 —H —H -nPr —H —H -Me —O-^(t)Bu 199 (M⁺−46, 96); 72 (100) I-40 -Benzyl -Me -nPr —H —H -Me —O-^(t)Bu 350 (M⁺+H, 16); 348 (20); 176 (100) I-41 -Benzyl -Me -nPr —H —H -Bn —O-^(t)Bu 426 (M⁺+H, 17); 414 (M⁺−H, 19); 179 (100) I-42 —CO—O-^(t)Bu

—H —H —H —O-^(t)Bu 348 (M⁺+H, 17); 346 (M⁺−H, 16); 236 (100) I-43 —H

—H —H —H —OH 192 (M⁺+H, 90); 134 (100) I-44 —CO—O-^(t)Bu

—H —H -Me —O-^(t)Bu 360 (M⁺+H, 92); 304 (100) I-45 —H

—H —H -Me —OH 204 (M⁺+H, 100); 190 (32) I-46 —CO—O-^(t)Bu —(CH₂)₃— —H —H -Bn —O-^(t)Bu 420 (M⁺+H, 94); 364 (100) I-47 —H —(CH₂)₃— —H —H -Me —OH 188 (M⁺+H, 100) I-48 —CO—O-^(t)Bu —(CH₂)₃— —H —H -Me —O-^(t)Bu 344 (M⁺+H, 100); 288 (76) I-49 —CO—O-^(t)Bu —(CH₂)₄— —H —H -Bn —O-^(t)Bu 434 (M⁺+H, 20); 334 (100) I-50 —H —(CH₂)₄— —H —H -Bn —OH 278 (M⁺+H, 100) I-51 —CO—O-Benzyl —H -iBu —H —H —H —OH 322 (M⁺+H, 40); 156 (100) I-52 -Benzyl -Me -Me —H —H -Me

334 (M⁺; 1); 148 (100) I-53 —H -Me -Me —H —H -Me

I-54 -Benzyl -Me -Me —H —H -Me

347 (M⁺; 0.66); 148 (100) I-55 —H -Me -Me —H —H -Me

257 (M⁺; 5); 58 (100) I-56 -Benzyl -Me -Me —H —H -Me

330 (M⁺; 1); 148 (100) I-57 -Benzyl -Me -Me —H —H -Me

446 (M⁺; 1.14); 346 (70); 148 (100); 100 (92) I-58 —H -Me -Me —H —H -Me

356 (M⁺; 1); 256 (35); 100 (100); 58 (66) I-59 -Benzyl -Me -Me —H —H -Me

460 (M⁺; 0.45); 341 (38); 148 (100); 91 (53) I-60 —H -Me -Me —H —H -Me

370 (M⁺; 20); 256 (41); 148 (40); 58 (100) I-61 -Benzyl -Me -Me —H —H -Me —NMe-OMe 308 (M⁺; 2); 148 (100) I-62 —H -Me -Me —H —H -Me —NMe-OMe 218 (M; 0.5); 58 (100) I-63 -Benzyl -Me -Me —H —H -Me

349 (M⁺; 0.24); 148 (100) I-64 —H -Me -Me —H —H -Me

I-65 -Benzyl -Me -Me —H —H -Me

346 (M⁺, 0.5); 148 (100) I-66 —H -Me -Me —H —H -Me

256 (M, S); 58 (100) I-67 -Benzyl -Me -Me —H —H -Me

403 (M⁺; 0.5); 148 (100); 91 (52) I-68 —H -Me -Me —H —H -Me

279 (M⁺, 0.5); 121 (32); 58 (100) I-69 -Benzyl -Me -Me —H —H -Me

404 (M⁺; 0.28); 346 (M⁺—(CH₂)₂—NMe₂; 62); 285 (60); 148 (100) I-70 —H -Me -Me —H —H -Me

314 (M⁺; 0.5); 58 (100) I-71 -Benzyl -Me -Me —H —H -Me

410 (M⁺; 1); 291 (50); 148 (100); 91 (55) I-72 —H -Me -Me —H —H -Me

I-73 -Benzyl -Me -Me —H —H -Me

410 (M⁺; 0.24); 291 (32); 148 (100); 91 (42) I-74 —H -Me -Me —H —H -Me

I-75 -Benzyl -Me -Me —H —H -Me

405 (M⁺; 1); 148 (100); 91 (41) I-76 —H -Me -Me —H —H -Me

315 (M⁺; 0.5); 58 (100) I-77 -Benzyl -Me -Me —H —H -Me

489 (M⁺; 1); 148 (100); 91 (40) I-78 —H -Me -Me —H —H -Me

I-79 -Benzyl -Me -Me —H —H -Me

411 (M⁺; 0.5); 148 (100) I-80 —H -Me -Me —H —H -Me

321 (M⁺; 8); 58 (100) I-81 -Benzyl -Me -Me —H —H -Me

433 (MH⁺; 100); 141 (12) I-82 —H -Me -Me —H —H -Me

343 (MH⁺; 100); 141 (11) I-83 -Benzyl -Me -Me —H —H -Me

376 (MH⁺; 100); 141 (14) I-84 —H -Me -Me —H —H -Me

286 (MH⁺; 100); 201 (22) I-85 -Benzyl -Me -Me —H —H -Me

392 (MH⁺; 100); 141 (22) I-86 —H -Me -Me —H —H -Me

302 (MH⁺; 100); 217 (20) I-87 -Benzyl -Me -Me —H —H -Me

468 (MH⁺; 100); 141 (19) I-88 —H -Me -Me —H —H -Me

378 (MH⁺; 100); 244 (42) I-89 -Benzyl -Me -Me —H —H -Me

445 (MH⁺; 100); 141 (18) I-90 —H -Me -Me —H —H -Me

355 (MH⁺; 100); 141 (4) I-91 —H -Me -Me —H —H -Me

342 (NH⁺; 1); 58 (100) I-92 —H -Me -Me —H —H -Me

241 (MH⁺; 100) 141 (4) I-93 —H -Me -Me —H —H -Me

284 (MH⁺; 100); I-94 —H -Me -Me —H —H -Me

314 (MH⁺; 100); I-95 -Benzyl -Me -Me —H —H -Me

425 (M⁺; 13); 148 (100) I-96 —H -Me -Me —H —H -Me

335 (M⁺; 60); 250 (100) I-97 -Benzyl -Me -Me —H —H -Me

425 (M⁺; 1); 148 (100) I-98 -Benzyl -Me -Me —H —H -Me

426 (M⁺; 1); 148 (100) I-99 -Benzyl -Me -Me —H —H -Me

426 (M⁺; 4); 148 (100) I-100 -Benzyl -Me -Me —H —H -Me

415 (M⁺; 0.5); 148 (100) I-101 —H -Me -Me —H —H -Me

325 (M⁺; 6); 124 (100) I-102 -Benzyl -Me -Me —H —H -Me

346 (M⁺; 2); 148 (100) I-103 —H -Me -Me —H —H -Me

257 (MH⁺; 98); 172 (100) I-104 -Benzyl -Me -Me —H —H -Me

318 (M⁺; 2); 148 (100) I-105 —H -Me -Me —H —H -Me

229 (MH⁺; 100); 144 (34) I-106 -Benzyl -Me -iPr —H —H -Me

360 (M⁺; 2); 176 (100) I-107 —H -Me -iPr —H —H -Me

I-108 -Benzyl -Me -Bn —H —H -Me

408 (M⁺; 1); 91 (100) I-109 —H -Me -Bn —H —H -Me

318 (M⁺; 0.5); 134 (100) I-110 -Benzyl -Me -sBu —H —H -iPr

402 (M⁺; 3); 190 (100) I-111 —H -Me -sBu —H —H -iPr

313 (MH⁺; 1); 112 (100) I-112 -Benzyl -Me -Me —H —H -Me

447 (M⁺; 3); 148 (100) I-113 —H -Me -Me —H —H -Me

358 (MH⁺; 100); 302 (55) I-114 -Benzyl -Me -Me —H —H -Me —O—Et 293 (M⁺; 1); 148 (100) Abbreviation: Me: -methyl; Et: -ethyl; Pr: -propyl; Bu: -butyl; Bn: -benzyl; i-, s- and t-: iso-, secondary- and tertiary ^(a))FAB-MS, MS-APCl or E1-MS m/z (%); ^(b)) ¹HNMR (400 MHz, CDCl₃, δ) in ppm 

1. A method of treating an endoparasitic infection comprising administering to a human or animal in need thereof an effective amount of a didepsipeptide of the formula (I)

wherein R¹ represents hydrogen, straight-chain or branched alkyl having up to 6 carbon atoms, C₃₋₆-cycloalkyl, aryl-C₁₋₂-alkyl or het-C₁₋₂-alkyl, R¹ and R² together with the atoms to which they are bonded represent a 5- or 6-membered ring which can optionally be interrupted by sulphur, and is optionally substituted, R² and R³ independently of one another represent hydrogen, straight-chain or branched alkyl having up to 6 carbon atoms, halogenoalkyl, hydroxyalkyl, C₁₋₄-alkanoyloxyalkyl, C₁₋₂-alkoxyalkyl, mercaptoalkyl, C₁₋₂-alkylthioalkyl, C₁₋₂-alkylsulphinylalkyl, C₁₋₂-alkylsulphonylalkyl, carboxyalkyl, carbamoylalkyl, aminoalkyl, C₁₋₆-alkylaminoalkyl, C₁₋₆-dialkylaminoalkyl, guanidinoalkyl, which can optionally be substituted by one or two benzyloxycarbonyl radicals or by one, two, three or four C₁₋₂-alkyl radicals, C₁₋₄-alkoxycarbonylaminoalkyl, C₂₋₆-alkenyl, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, and optionally substituted aryl, aryl-C₁₋₂-alkyl, heteroaryl, heteroaryl-C₁₋₂-alkyl, or R² and R³ together represent a spirocyclic ring, R⁴ and R⁵ independently of one another represent hydrogen, straight-chain or branched alkyl having up to 6 carbon atoms, halogenoalkyl, hydroxyalkyl, C₁₋₄-alkanoyloxyalkyl, C₁₋₂-alkoxyalkyl, mercaptoalkyl, C₁₋₂-alkylthioalkyl, C₁₋₂-alkylsulphinylalkyl, C₁₋₂-alkylsulphonylalkyl, carboxyalkyl, carbamoylalkyl, aminoalkyl, C₁₋₆-alkylaminoalkyl, C₁₋₆-dialkylaminoalkyl, guanidinoalkyl, which can optionally be substituted by one or two benzyloxycarbonyl radicals or by one, two, three or four C₁₋₂-alkyl radicals, C₁₋₄-alkoxycarbonylaminoalkyl, C₂₋₆-alkenyl, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, and optionally substituted aryl, aryl-C₁₋₂-alkyl, heteroaryl, heteroaryl-C₁₋₂alkyl, or R⁴ and R⁵ together represent a spirocyclic ring, A represents hydrogen, C₁₋₆-alkyl, formyl, C₁₋₄-alkoxydicarbonyl or a radical of the group G¹

in which

can denote carbonyl, thiocarboxyl, —C═CH—NO₂, —C═CH—CN, —C═N—R⁶, sulphoxyl, sulphonyl, —P(O)—OR⁷ or P(S)—OR⁷, R⁶ represents hydrogen, hydroxyl, C₁₋₄-alkoxy, C₁₋₄-alkylcarbonyl, C₁₋₄-halogenoalkylcarbonyl, C₁₋₄-alkylsulphonyl, nitro or cyano, and R⁷ represents hydrogen or C₁₋₄-alkyl, and Q represents straight-chain or branched C₁₋₆-alkyl, C₁₋₆-halogenoalkyl, hydroxy-C₁₋₆-alkyl, C₁₋₄-alkanoyloxy-C₁₋₆-alkyl, C₁₋₂-alkoxy-C₁₋₆-alkyl, mercapto-C₁₋₆-alkyl-, C₁₋₂-alkylthio-C₁₋₆-alkyl, C₁₋₂-alkylsulphinyl-C₁₋₆-alkyl, C₁₋₂-alkylsulphonyl-C₁₋₆-alkyl, carboxy-C₁₋₆-alkyl, carbamoyl-C₁₋₆-alkyl, amino-C₁₋₆-alkyl, C₁₋₆-alkylamino-C₁₋₆-alkyl, C₁₋₆-dialkylaminoalkyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₂₋₆-halogenoalkenyl, C₃₋₆-cycloalkyl, and optionally substituted aryl, aryl-C₁₋₂-aryl, hetaryl or hetaryl-C₁₋₂-alkyl, or optionally represents a radical from the group G² and G³

in which

can denote carboxyl, thiocarboxyl or sulphonyl, Y represents oxygen, sulphur or —NR⁹, R⁸ in the case where Y represents nitrogen can denote a cyclic amino group linked via a nitrogen atom, R⁸ and R⁹ independently of one another represent hydrogen, straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkenyl, C₁₋₆-alkynyl, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, aryl, arylalkyl, hetaryl, hetarylalkyl, each of which is optionally substituted, or R⁸ and R⁹ together with the adjacent N atom a carbocyclic 5-, 6- or 7-membered ring system or a 7 to 10-membered bicyclic ring system which can optionally also be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl, carbonyl, —N—O, —N═, —NR¹¹— or by quaternized nitrogen and is optionally substituted, R¹⁰ represents hydrogen or C₁₋₄-alkyl, R¹¹ represents hydrogen, straight-chain or branched C₁₋₆-alkyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₈-cycloalkyl, C₃₋₈-cycloalkyl-C₁₋₂-alkyl, C₁₋₄-alkoxycarbonyl, C₁₋₄-alkylcarbonyl, C₃₋₆-cycloalkylcarbonyl, cyan, aryl, aryl-C₁₋₂-alkyl, hetaryl, hetaryl-C₁₋₂-alkyl, each of which is optionally substituted, and B represents hydroxyl, C₁₋₆-alkoxy, C₂₋₆-alkenyloxy, C₂₋₆-alkynyloxy, C₃₋₇-cycloalkyloxy, C₃₋₇-cycloalkylalkyloxy, aryloxy-, aryl-C₁₋₂-alkyloxy, hetaryloxy, hetaryl-C₁₋₂-alkyloxy, each of which is optionally substituted, or represents the radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and —NR¹⁵—OR¹⁶, in which R¹² and R¹³ independently of one another represent hydrogen, straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl, C₁₋₆-alkylsulphonyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₆-cycloalkyl, C₃₋₈-cycloalkyl-C₁₋₂-alkyl, aryl, arylcarbonyl, arylsulphonyl, aryl-C₁₋₂-alkyl, hetaryl, hetarylcarbonyl, hetarylsulphonyl or hetaryl-C₁₋₂-alkyl, or R¹² and R¹³ together with the adjacent N atom represents a carbocyclic 5-, 6-, 7-, or 8-membered ring system or a 7 to 10-membered bicyclic ring system which can optionally also be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl, carbonyl, —N—O, —N═, —NR¹¹— or by quaternized nitrogen and is optionally substituted, R¹⁴ represents hydrogen, straight-chain or branched C₁₋₆-alkyl, C₃₋₆-cycloalkyl, aryl-C₁₋₂-alkyl or hetaryl-C₁₋₂-alkyl, each of which is optionally substituted, R¹⁵ and R¹⁶ independently of one another denote hydrogen, straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₆-cycloalkyl, aryl-C₁₋₂-alkyl or hetaryl-C₁₋₂-alkyl, each of which is optionally substituted, R¹⁵ and R¹⁶ together with the adjacent N—O group represent a carbocyclic 5-, 6-, or 7-membered ring, or an optical isomer or salt thereof.
 2. A method of treating an endoparasitic infection comprising administering to a human or animal in need thereof an effective amount of a didepsipeptide of the formula (Ia) and its salt

in which R¹ represents hydrogen, straight-chain or branched C₁₋₄-alkyl, R² represents hydrogen, straight-chain or branched alkyl having up to 6 carbon atoms alkenyl having up to 4 carbon atoms, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, aryl, aryl-C₁₋₂-alkyl, hetaryl, hetaryl-C₁₋₂-alkyl each of which is optionally substituted, alternatively, R¹ and R² together with the atoms to which they are bonded represent a 5- or 6-membered ring which can optionally be interrupted by oxygen, sulphur, sulphoxyl or sulphonyl and is optionally substituted, R³ and R⁴ represent hydrogen, R⁵ represents hydrogen, straight-chain or branched alkyl having up to 6 carbon atoms, alkenyl having up to 4 carbon atoms, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, aryl, aryl-C₁₋₂-alkyl, hetaryl, hetaryl-C₁₋₂-alkyl each of which is optionally substituted,

represents carboxyl, thiocarboxyl, —C═CH—NO₂, —C═CH—CN, —C═N—R⁶, sulphoxyl, sulphonyl, —P(O)—O—R⁷ or P(S)—O—R⁷, R⁶ represents hydrogen, hydroxyl, C₁₋₄-alkoxy, C₁₋₄-alkylcarbonyl, C₁₋₄-halogenoalkylcarbonyl, C₁₋₄-alkylsulphonyl, nitro or cyano, and R⁷ represents hydrogen or C₁₋₄-alkyl, and Q represents straight-chain or branched C₁₋₆-alkyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₆-cycloalkyl or hetaryl-C₁₋₂-alkyl, or optionally represents a radical from the group G² and G³

in which

can denote carboxyl, thiocarboxyl or sulphonyl, Y represents oxygen, sulphur or —NR⁹, R⁸ in the case where Y represents nitrogen can denote a cyclic amino group linked via a nitrogen atom, R⁸ and R⁹ independently of one another represents hydrogen, straight-chain or branched C₁₋₆-alkyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₂-alkyl, hetaryl or hetaryl-C₁₋₂-alkyl, each of which is optionally substituted, or R⁸ and R⁹ together with the adjacent N atom represent a carbocyclic 5-, 6- or 7-membered ring system or a 7 to 10-membered bicyclic ring system which can optionally also be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl, carbonyl, —N—O—, —N═, —NR¹¹— or by quaternized nitrogen and is optionally substituted, R¹⁰ represents hydrogen or C₁₋₄-alkyl, and R¹¹ represents hydrogen, straight-chain or branched C₁₋₆-alkyl, C₃₋₆-cycloalkyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₆-cycloalkyl, C₁₋₄-alkoxycarbonyl, C₁₋₄-alkylcarbonyl, C₃₋₆-cycloalkylcarbonyl, cyano, aryl, aryl-C₁₋₂-alkyl, hetaryl or hetaryl-C₁₋₂-alkyl, each of which is optionally substituted, and B represents C₁₋₆-alkoxy, C₂₋₆-alkenyloxy, C₂₋₆-alkynyloxy, C₃₋₇-cycloalkyloxy, C₃₋₇-cycloalkyl-C₁₋₂-alkyloxy, aryloxy-, aryl-C₁₋₂-alkyloxy, hetaryloxy, hetaryl-C₁₋₂-alkyloxy, each of which is optionally substituted, or represents the amino radicals —NR¹²R¹³, —NR¹⁴—NR¹²R¹³ and —NR¹⁵—OR¹⁶, in which R¹² and R¹³ independently of one another represent hydrogen, straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl, C₁₋₆-alkylsulphonyl, C₂₋₆-alkenyl, C₂₋₆ alkynyl, C₃₋₈-cycloalkyl, C₃₋₈-cycloalkyl-C₁₋₂-alkyl, aryl, arylcarbonyl, arylsulphonyl, aryl-C₁₋₂-alkyl, hetaryl, hetarylcarbonyl, hetarylsulphonyl or hetaryl-C₁₋₂-alkyl, or R¹² and R¹³ together with the adjacent N atom represent a carbocyclic 5-, 6-, 7- or 8-membered ring system or a 7 to 10-membered bicyclic ring system, which can optionally also be interrupted by oxygen, sulphur, sulphoxyl, sulphonyl, carbonyl, —N—O, —N═, —NR¹¹— or by quaternized nitrogen and is optionally substituted, R¹⁴ represents hydrogen, straight-chain or branched C₁₋₆-alkyl, C₃₋₆-cycloalkyl, each of which is optionally substituted, R¹⁵ and R¹⁶ independently of one another denote hydrogen, straight-chain or branched C₁₋₆-alkyl, C₁₋₆-alkylcarbonyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl or C₃₋₆-cycloalkyl, each of which is optionally substituted, and R¹⁵ and R¹⁶ together with the adjacent N—O-group represent a carbocyclic 5-, 6- or 7-membered ring, with the proviso in the case where in formula (Ia) R¹, R⁵ and =G=X together represent the following radicals: R¹ represents hydrogen and methyl, R⁵ represents hydrogen,

represents carboxyl, the radicals Q and B must fulfill the following condition: Q represents radicals other than methyl, B represents radicals other than —NH₂, and with the proviso in the case where in formula (Ia) G² and =G=X together represent the following radicals:

represents carboxyl, G² represents tert-butyloxy, benzyloxy and 4-nitro-benzyloxy, the radical B represents radicals other than tert-butyloxy, benzyloxy and 4-nitro-benzyloxy, and with the proviso that, if in formula (Ia) R⁴ and R⁵ are hydrogen, B must not represent NH₂, and with the proviso that, if in formula (Ia) R¹ and R⁵ represent hydrogen and

B does not represent methylamino, and with the proviso that, if in formula (Ia)

 represents benzyloxycarbonyl or

B does not represent benzylamino, and with the proviso that, if in formula (Ia)

 represents tert-butyloxycarbonyl and R¹ and R³ represent H and either R⁴ and R⁵ represents methyl and the other radical represents H, B does not represent ethoxy, and with the proviso that the compound of formula

is excluded, furthermore with the proviso that the compounds methyl O-(N-carbobenzoxy-l-leucyl)-hydroxyethanoate, methyl O-(N-carbobenzoxy-l-leucyl)-(S)-2-hydroxy-3-phenylpropanoate, methyl O-(N-carbobenzoxy-l-leucyl)-(S)-2-hydroxypropanoate, methyl O-(N-carbobenzoxy-l-leucyl)-(S)-2-hydroxy-4-methylpentanoate, ethyl N-(benzyloxycarbonyl)amino-2-(O-glycyl)-glycolate, ethyl N-(benzyloxycarbonyl)-amino-2-(O-glycyl)-lactate, ethyl N-(benzyloxycarbonyl)-amino-2-(O-alanyl)-glycolate, ethyl N-(benzyloxycarbonyl)-amino-2-(O-alanyl)-lactate are excluded, and their optical isomers and racemates. 